Formatting of packet wiki page...

sucks. Here's a better one for free (note, you can remove the code block backticks to get a Markdown table if you prefer).
Client -> Server

ID | Size | Effect                          | Usage
---|------|---------------------------------|---------------------------------
01 |    5 | Walk                            | 01 [WORD x] [WORD y]
02 |    9 | Walk to entity                  | 02 [DWORD entity kind] [DWORD id]
03 |    5 | Run                             | 03 [WORD x] [WORD y]
04 |    9 | Run to entity                   | 04 [DWORD entity kind] [DWORD id]
05 |    5 | Shift Left Click Skill          | 05 [WORD x] [WORD y]
06 |    9 | Left Skill on unit              | 06 [DWORD entity kind] [DWORD id]
07 |    9 | Shift left skill on unit        | 07 [DWORD entity kind] [DWORD id]
08 |    5 | Shift Left skill (hold)         | 08 [WORD x] [WORD y]
09 |    9 | Left Skill on unit (hold)       | 09 [DWORD entity kind] [DWORD id]
0a |    9 | Shift left skill unit (hold)    | 0a [DWORD entity kind] [DWORD id]
0b |    1 | Unknown                         | 0b
0c |    5 | Right skill                     | 0c [WORD x] [WORD y]
0d |    9 | Right skill unit                | 0d [DWORD entity kind] [DWORD id]
0e |    9 | Shift right skill unit          | 0e [DWORD entity kind] [DWORD id]
0f |    5 | Right skill (hold)              | 0f [WORD x] [WORD y]
10 |    9 | Right skill unit (hold)         | 10 [DWORD entity kind] [DWORD id]
11 |    9 | Shift Right skill unit (hold)   | 11 [DWORD entity kind] [DWORD id]
12 |    1 | Unknown                         | 12
13 |    9 | Interact (click) entity         | 13 [DWORD entity kind] [DWORD id]
14 |    * | Overhead Chat                   | 14 00 00 [*char message] 00 00 00
15 |    * | Chat                            | 15 01 00 [*char message] 00 00 00
16 |   13 | Pick item (ground)              | 16 04 00 00 00 [DWORD id] [DWORD inventory(0) or cursor (1)]
17 |    5 | Drop item (ground)              | 17 [DWORD id]
18 |   17 | Insert item in buffer           | 18 [DWORD id] [DWORD xpos] [DWORD ypos] [DWORD buffer]
19 |    5 | Remove item from buffer         | 19 [DWORD id]
1a |    9 | Equip item                      | 1a [DWORD id] [WORD position] 00 00
1b |    9 | Swap 2 handed item              | 1b [DWORD id] [WORD position] 00 00
1c |    3 | Remove body item                | 1c [WORD position]
1d |    9 | Swap cursor item with body      | 1d [DWORD id] [WORD position] 00 00
1e |    9 | Swap 2 1-handed with a 2-handed | 1e [DWORD unknown] [DWORD unknown]
1f |   17 | Swap cursor/buffer items        | 1f [DWORD cursor item id] [DWORD buffer item id] [DWORD xpos] [DWORD ypos]
20 |   13 | Activate buffer item            | 20 [DWORD id] [WORD x] 00 00 [WORD y] 00 00
21 |    9 | Stack items                     | 21 [DWORD item to stack id] [DWORD item where it stacks id]
22 |    5 | Unstack items                   | 22 [DWORD unknown]
23 |    9 | Item to belt                    | 23 [DWORD id] [WORD x] [WORD y]
24 |    5 | Item from belt                  | 24 [DWORD id]
25 |    9 | Switch belt item                | 25 [DWORD cursor item][DWORD belt item]
26 |   13 | Use belt item                   | 26 [DWORD id] [DWORD shift key stats] [DWORD unknown]
27 |    9 | Identify item                   | 27 [DWORD item id] [DWORD scroll id]
28 |    9 | Socket item                     | 28 [DWORD item to socket id] [DWORD socketable item id]
29 |    9 | Scroll to book                  | 29 [DWORD scroll id] [DWORD book id]
2a |    9 | Item to cube (indirect)         | 2a [DWORD item id] [DWORD cube id]
2b |   -- | Unused                          | --
2c |   -- | Unused (Logged as hack)         | --
2d |   -- | Unused (Logged as hack)         | --
2e |   -- | Unknown                         | --
2f |    9 | Initiate entity chat            | 2f [DWORD entity kind] [DWORD id]
30 |    9 | Terminate entity chat           | 30 [DWORD entity kind] [DWORD id]
31 |    9 | Quest message                   | 31 [DWORD id] [DWORD message]
32 |   17 | Buy item from NPC buffer        | 32 [DWORD entity id] [DWORD item id] [DWORD tab] [DWORD cost]
33 |   17 | Sell item to NPC buffer         | 33 [DWORD entity id] [DWORD item id] [DWORD tab] [DWORD cost]
34 |    5 | Identify items with NPC         | 34 [DWORD entity id]
35 |   17 | Repair                          | 35 [DWORD entity id] [DWORD item id] [DWORD tab] [DWORD cost?]
36 |    9 | Hire merc                       | 36 [DWORD entity id] [DWORD merc id]
37 |    5 | Identify (from gamble)          | 37 [DWORD item id]
38 |   13 | Entity action                   | 38 [DWORD action] [DWORD entity id] [DWORD complement]
39 |    5 | Purchase Life                   | 39 [DWORD NPC id]
3a |    3 | Add stat point                  | 3a [WORD stat]
3b |    3 | Add skill point                 | 3b [WORD skill]
3c |    9 | Select skill                    | 3c [WORD skill] 00 [BYTE left (80) or right 00) skill] FF FF FF FF
3d |    5 | Highlight a door                | 3d [DWORD object id]   (Logged as Mode (5) crash)
3e |    5 | Activate Scroll of Inifuss      | 3e [DWORD scroll of infuss. id]
3f |    3 | Play audio                      | 3f [WORD sound message]
40 |    1 | Request Quest Data              | 40
41 |    1 | Resurrect                       | 41
42 |   -- | Unknown/Unused                  | --
43 |   -- | Unknown/Unused                  | --
44 |   17 | Staff in orifice                | 44 [DWORD orifice entity kind] [DWORD orifice id] [DWORD staff id] [DWORD entity state]
45 |    9 | Change TP Location              | 45 [DWORD entity id] [WORD location] 00 00 (logged as hack)
46 |   13 | Have Merc Interact              | 46 [DWORD merc id] [DWORD entity id][DWORD entity type]
47 |   13 | Move Merc                       | 47 [DWORD Merc ID] [WORD X] 00 00 [WORD Y] 00 00
48 |    1 | Turns off busy state            | 48
49 |    9 | Take WP/Close WP                | 49 [DWORD wp id] [BYTE destination] 00 00 00
4a |   -- | Unused                          | --
4b |    9 | Request Entity Update           | 4b [DWORD entity type][DWORD entity id]
4c |    5 | Transmorgify                    | 4c [DWORD Object ID]
4d |    3 | Play NPC Message                | 4d [WORD NPC Sound Message]
4e |   -- | Unused                          | --
4f |    7 | Click Button                    | 4f [WORD button id] [WORD unknown] [WORD complement]
50 |    9 | Drop Gold                       | 50 [DWORD player id] [DWORD gold pieces]
51 |    9 | Bind hotkey to skill            | 51 [BYTE skill]  [BYTE left (80) or right 00) skill] [WORD hotkey] FF FF FF FF
52 |    5 | Unknown                         | 52 [DWORD unknown]
53 |    1 | Turn stamina on   (Not used)    | 53
54 |    1 | Turn stamina off (Not used)     | 54
55 |   -- | Unused                          | --
56 |   -- | Unused                          | --
57 |   -- | Unused                          | --
58 |    3 | Quest Completed                 | 58 [WORD Quest id]
59 |   17 | Make entity move                | 59 [DWORD entity kind] [DWORD entity id] [WORD x] 00 00 [WORD y] 00 00
5a |   -- | Unused                          | --
5b |   -- | Unused                          | --
5c |   -- | Unused                          | --
5d |    7 | Squelch/Hostile                 | 5d [BYTE button] [BYTE toggle on/off] [DWORD player id]
5e |    6 | Invite Party                    | 5e [BYTE button] [DWORD player id]
5f |    5 | Update Player Pos               | 5f [WORD x] [WORD y]
60 |    1 | Swap weapons                    | 60
61 |    3 | Drop/Pickup merc item           | 61 [WORD position (00 to drop)]
62 |    5 | Resurrect Merc                  | 62 [DWORD npc id]
63 |    5 | Shift left-click item (to belt) | 63 [DWORD item]
64 |    9 | Hack Detection                  | 64 [DWORD unknown] [DWORD unknown]
65 |   -- | Hack Detection                  | 65
66 |    * | Warden Response                 | 66 [BYTE Data Length] 00 [VARIABLE Data]
67 |   -- |                                 | --
68 |   37 | Game Join Request               | 68 [DWORD Server Hash] [WORD Server Token] [BYTE Char Type] [DWORD VerByte (0x0d)] [DWORD Unknown] [DWORD Unknown] 00 [Char Name[15]] 00
69 |    1 | Leave Game                      | 69
6a |   -- |                                 | --
6b |    1 | Join Game                       | 6b
6c |  262 | Upload Character Save           | 6c [dwUnk] [dwUnk] [char[252] SaveFile]
6d |   13 | Ping                            | 6d [DWORD Tickcount] [DWORD Delay] [DWORD WardenResponse or 00000000]
6e |   -- | Unknown/Unused                  | --
6f |   -- | Unknown/Unused                  | --

Server -> Client

ID    | Size | Effect                     | Usage
------|------|----------------------------|----------------------------
00    |    1 | Game Loading               | 00
01    |    8 | Game Flags                 | 01 [BYTE Difficulty] [WORD Unknown] [WORD  Hardcore?] [BYTE Expansion] [BYTE Ladder]
02    |    1 | Load Successful            | 02
03    |   12 | Load Act                   | 03 [BYTE Act] [DWORD Map ID] [WORD Area  Id] [DWORD Unknown]
04    |    1 | Load Complete              | 04
05    |    1 | Unload Complete            | 05
06    |    1 | Game Exit Sucessful        | 06
07    |    6 | Map Reveal                 | 07 [WORD Tile X] [WORD Tile Y] [BYTE Area Id]
08    |    6 | Map Hide                   | 08 [WORD Tile X] [WORD Tile Y] [BYTE Area Id]
09    |   12 | Assign Lvl Warp (Door)     | 09 [BYTE Unit Type] [DWORD Unit Id] [WORD X] [WORD Y] [WORD Warp Id]
0a    |    6 | Remove Object              | 0a [BYTE Unit Type] [DWORD Unit Id]
0b    |    6 | Game Handshake             | 0b [BYTE Unit Type] [DWORD Unit Id]
0c    |    9 | NPC Hit                    | 0c [BYTE Unit Type] [DWORD Unit Id] [WORD  Animation Id] [BYTE Life]
0d    |   13 | Player Stop                | 0d [BYTE Unit Type] [DWORD Unit Id] [BYTE  Unknown] [WORD Unit X] [WORD Unit Y] [BYTE Unknown] [BYTE Life]
0e    |   12 | Object State               | 0e [BYTE Unit Type] [DWORD Unit Id] [BYTE  Unknown (0x03)] [BYTE 0x00 = Can't Change Back || 0x01 = Can Change Back] [DWORD  Unit State]
0f    |   16 | Player Move                | 0f [BYTE Unit Type] [DWORD Unit Id] [BYTE  0x01 = Walk || 0x23 = Run || 0x20 = Knockback] [WORD Target X] [WORD Target Y] 00  [WORD Current X] [WORD Current Y]
10    |   16 | Player To Target           | 10 [BYTE Unit Type] [DWORD Unit Id] [BYTE  0x02 = Walk || 0x24 = Run] [BYTE Target Type] [DWORD Target Id] [WORD Current X]  [WORD Current Y]
11    |    8 | Report Kill                | 11 [BYTE Unit Type] [DWORD Unit Id] [WORD  Unknown]
12    |   26 | Unknown                    | --
13    |   14 | Unknown                    | --
14    |   18 | Unknown                    | --
15    |   11 | Reassign Player            | 15 [BYTE Unit Type] [DWORD Unit Id] [WORD  X] [WORD Y] [BYTE 0x01 = True || 0x00 = False]
16    |    * | Unknown                    | --
17    |   -- | Unused                     | --
18    |   15 | Unknown                    | --
19    |    2 | Gold to Inv.               | 19 [BYTE Amount]
1a    |    2 | Add Exp.                   | 1a [BYTE Amount]
1b    |    3 | Add Exp.                   | 1b [WORD Amount]
1c    |    5 | Add Exp.                   | 1c [DWORD Amount]
1d    |    3 | Base Attribute             | 1d [BYTE Attribute] [BYTE Amount]
1e    |    4 | Base Attribute             | 1e [BYTE Attribute] [WORD Amount]
1f    |    6 | Base Attribute             | 1f [BYTE Attribute] [DWORD Amount]
20    |   10 | Attribute Update           | 20 [DWORD Unit Id] [BYTE Attribute] [DWORD  Amount]
21    |   12 | Update Item Oskill         | 21 [WORD Unknown] [DWORD Unit Id] [WORD Skill] [BYTE Base Level] [BYTE Bonus Amount] [BYTE Unknown]
22    |   12 | Update Item Skill          | 22 [WORD Unknown (Unit Type?)] [DWORD Unit Id] [WORD Skill] [BYTE Amount] [WORD Unknown]
23    |   13 | Set Skill                  | 23 [BYTE Unit Type] [DWORD Unit Id] [Byte 0x00  = Right || Byte 0x01 = Left] [WORD Skill] FF FF FF FF
24    |   90 | Unknown                    | --
25    |   90 | Unknown                    | --
26    |    * | Game Chat                  | 26 [WORD Chat Kind] [WORD Unknown (0x02)]  00 00 00 00 [BYTE 0x05 = Normal Chat || 0x01 = Whisper] [Char Name] 00 [Message] 00
26 05 |    * | Overhead                   | 26 05 00 00 [BYTE Unit Type] [DWORD Unit Id]  [WORD Unknown] 00 [Message] 00
27    |   40 | NPC Info                   | 27 [BYTE Unit Type] [DWORD Unit Id]  [BYTES[34] Unknown]
28    |  103 | Quest Info                 | Research Incomplete
29    |   97 | Game Quest Info            | Research Incomplete
2a    |   15 | NPC Transaction            | 2a [BYTE Trade Type] [BYTE Result? - 0x00 =  Purchased || 0x01 = Sold || 0x0c = Insuffecient Gold] [DWORD Unknown] [DWORD  Merchandise Id] [DWORD Gold in Inventory]
2b    |   -- | Unused                     | --
2c    |    8 | Play Sound                 | 2c [BYTE Unit Type] [DWORD Unit Id] [WORD  Sound]
2d    |   -- | Unused                     | --
2e    |   -- | Unused                     | --
2f    |   -- | Unused                     | --
30    |   -- | Unused                     | --
31    |   -- | Unused                     | --
32    |   -- | Unused                     | --
33    |   -- | Unused                     | --
34    |   -- | Unused                     | --
35    |   -- | Unused                     | --
36    |   -- | Unused                     | --
37    |   -- | Unused                     | --
38    |   -- | Unused                     | --
39    |   -- | Unused                     | --
3a    |   -- | Unused                     | --
3b    |   -- | Unused                     | --
3c    |   -- | Unused                     | --
3d    |   -- | Unused                     | --
3e    |    * | Update Item Stats          | Research Incomplete
3f    |    8 | Use Stackable Item         | --
40    |   13 | Unknown                    | --
41    |   -- | Unused                     | --
42    |    6 | Clear Cursor               | 42 [BYTE Unit Type] [DWORD Player Id]
43    |   -- | Unused                     | --
44    |   -- | Unused                     | --
45    |   13 | Unknown                    | --
46    |   -- | Unused                     | --
47    |   11 | Relator 1                  | 47 [WORD Param 1] [DWORD Unit Id] [DWORD  Param 2]
48    |   11 | Relator 2                  | 48 [WORD Param 1] [DWORD Unit Id] [DWORD  Param 2]
49    |   -- | Unused                     | --
4a    |   -- | Unused                     | --
4b    |   -- | Unused                     | --
4c    |   16 | Unit Skill on Target       | 4c [BYTE Unit Type] [DWORD Unit Id] [WORD  Skill] [BYTE Unknown] [BYTE Unknown] [DWORD Target Id] 00 00
4d    |   17 | Unit Cast Skill            | 4d [BYTE Unit Type] [DWORD Unit Id] [DWORD  Skill] [BYTE Unknown] [WORD X] [WORD Y] 00 00
4e    |    7 | Merc For Hire              | 4e [WORD Merc Id?] [DWORD Unknown]
4f    |    1 | Start Merc List            | 4f
50    |   15 | Unknown                    | Needs Research
51    |   14 | Assign Object              | 51 [BYTE Object Type] [DWORD Object Id]  [WORD Object Code] [WORD X] [WORD Y] [BYTE State] [BYTE Interaction Type]
52    |   42 | Quest Log Info             | Research Incomplete
53    |   10 | Player Slot Refresh        | 53 [DWORD Slot #] [BYTE Unknown 0x00 || 0x80]  [DWORD Tickcount?]
54    |   10 | Unknown                    | --
55    |    3 | Unknown                    | --
56    |   -- | Unused                     | --
57    |   -- | Unused                     | --
58    |   14 | Unknown                    | --
59    |   26 | Assign Player              | 59 [DWORD Unit Id] [BYTE Char Type]  [NULLSTRING[16] Char Name] [WORD X] [WORD Y]
5a    |   40 | Event Messages             | *
5b    |   36 | Player In Game             | 5b [WORD Packet Length] [DWORD Player Id] [BYTE Char Type] [NULLSTRING[16] Char Name] [WORD Char Lvl] [WORD Party Id] 00 00 00 00 00 00 00 00
5c    |    5 | Player Left Game           | 5c [DWORD Player Id]
5d    |    5 | Quest Item State           | 5d [BYTE Unknown (Id?)]  [DWORD State?]
5e    |   38 | Unknown                    | --
5f    |    5 | Unknown                    | --
60    |    7 | Townportal State           | 60 [BYTE State] [BYTE Area Id] [DWORD Unit Id]
61    |    2 | Unknown                    | 61 [BYTE Unknown]
62    |    7 | Unknown                    | --
63    |    * | Waypoint Menu              | 63 [DWORD Unit Id] [BYTES* Available Waypoints]
64    |   -- | Unused                     | --
65    |    7 | Player Kill Count          | 65 [DWORD Player Id] [WORD Count]
66    |    7 | Unknown                    | --
67    |   16 | NPC Move                   | 67 [DWORD Unit Id] [BYTE 0x01 = Walk || 0x17 = Run] [WORD X] [WORD Y] [WORD Unknown] [BYTE Unknown] [WORD Unknown] [BYTE Unknown]
68    |   21 | NPC Move to Target         | 68 [DWORD Unit Id] [BYTE 0x00 = Walk || 0x18 = Run] [WORD X] [WORD Y] [BYTE Target Unit Type] [DWORD Target Id] [WORD Unknown] [BYTE Unknown] [WORD Unknown] [BYTE Unknown]
69    |   12 | NPC State                  | 69 [DWORD Unit Id] [BYTE State] [WORD X] [WORD Y] [BYTE Unit Life] [BYTE Unknown]
6a    |   12 | Unknown                    | --
6b    |   16 | NPC Action                 | 6b [DWORD Unit Id] [BYTE Action] 00 00 00 00 00 00 [WORD X] [WORD Y]
6c    |   16 | NPC Attack                 | 6c [DWORD Unit Id] [WORD Attack Type] [DWORD Target Id] [BYTE Target Type] [WORD X] [WORD Y]
6d    |   10 | NPC Stop                   | 6d [DWORD Unit Id] [WORD X] [WORD Y] [BYTE Unit Life]
6e    |    1 | Unknown                    | 6e
6f    |    1 | Unknown                    | 6f
70    |    1 | Unknown                    | 70
71    |    1 | Unknown                    | 71
72    |    1 | Unknown                    | 72
73    |   32 | Unknown                    | --
74    |   10 | Player Corpse Assign       | 74 [BYTE Assign 0x00 = False || 0x01 True] [DWORD Owner Id] [DWORD Corpse Id]
75    |   13 | Player Party Info          | 75 [DWORD Unit Id] [WORD Party Id] [WORD Char Level] [WORD Relationship] [WORD In Your Party? 0x00 = False || 0x01 = True]
76    |    6 | Player In Proximity        | 76 [BYTE Unit Type] [BYTE Unit Id]
77    |    2 | Button Actions             | 77 [BYTE Action]
78    |   21 | Trade Accepted             | 78 [NULLSTRING[16] Char Name] [DWORD Unit Id]
79    |    6 | Gold in Trade              | 79 [BYTE Gold Owner] [DWORD Amount]
7a    |   13 | Pet Action                 | 7a [BYTE 0x00 = Unsummoned/Lost Sight || 0x01 = Summoned/Assign] [BYTE Skill] [WORD Pet Type] [DWORD Owner Id] [DWORD Pet Id]
7b    |    8 | Assign Skill Hotkey        | 7b [BYTE Slot] [BYTE Skill] [BYTE 0x00 = Right || 0x80 = Left] FF FF FF FF
7c    |    6 | Use Scroll                 | 7c [BYTE Type] [DWORD Item Id]
7d    |   18 | Set Item State             | --
7e    |    5 | Unknown                    | --
7f    |   10 | Ally Party Info            | 7f  [BYTE Unit Type] [WORD Unit Life] [DWORD Unit Id] [DWORD Unit Area Id]
80    |   -- | Unused                     | --
81    |   20 | Assign Merc                | 81 [BYTE Unknown] [WORD Merc Kind?] [DWORD Owner Id] [DWORD Merc Id] [DWORD Unknown] [DWORD Unknown]
82    |   29 | Portal Ownership           | 82 [DWORD Owner Id] [NULLSTRING[16] Owner Name] [DWORD Local Id] [DWORD Remote Id]
83    |   -- | Unused                     | --
84    |   -- | Unused                     | --
85    |   -- | Unused                     | --
86    |   -- | Unused                     | --
87    |   -- | Unused                     | --
88    |   -- | Unused                     | --
89    |    2 | Special Quest Event        | 89 [BYTE Event Id]
8a    |    6 | NPC Wants to Interact      | 8a [BYTE Unit Type] [DWORD Unit Id]
8b    |    6 | Player Relationship        | 8b [DWORD Unit Id] [BYTE 0x00 = No Party || 0x01 = In Party || 0x02 = Wants to Party]
8c    |   11 | Relationship Update        | 8c [DWORD Player 1 Id] [DWORD Player 2 Id] [WORD Relation State]
8d    |    7 | Assign Player To Party     | 8d [DWORD Player Id] [WORD Party Id]
8e    |   10 | Corpse Assign              | 8e [BYTE 0x00 = Unassign || 0x01 = Assign] [DWORD Owner Id] [DWORD Corpse Id]
8f    |   33 | Pong                       | 8f [BYTES[32] 0x00]
90    |   13 | Party Automap Info         | 90 [DWORD Player Id] [DWORD Player X] [DWORD Player Y]
91    |   26 | Unknown                    | --
92    |    6 | Unknown                    | --
93    |    8 | Unknown                    | --
94    |    * | Base Skill Levels          | 94 [BYTE Amount of Skills] [DWORD Player Id] (for each skill-) [WORD Skill] [BYTE Level]
95    |   13 | Life and Mana Update       | 95 [WORD Unit Life] [WORD Unit Mana] [WORD Unit Stamina] [WORD X] [WORD Y] [WORD Unknown]
96    |    9 | Walk Verify                | 96 [WORD Stamina] [WORD X] [WORD Y] [WORD State]
97    |    1 | Weapon Switch              | 97
98    |    7 | Unknown                    | --
99    |   16 | Skill Triggered            | --
9a    |   17 | Unknown                    | --
9b    |    7 | (Merc Related?)            | Research Needed 9b [WORD Unknown] [DWORD Unknown]
9c    |    * | Item Action (World)        | *
9d    |    * | Item Action (Owned)        | *
9e    |    7 | Merc Attribute             | 9e [BYTE Attribute] [DWORD Merc Id] [BYTE Amount]
9f    |    8 | Merc Attribute             | 9f [BYTE Attribute] [DWORD Merc Id] [WORD Amount]
a0    |   10 | Merc Attribute             | a0 [BYTE Attribute] [DWORD Merc Id] [DWORD Amount]
a1    |    7 | Merc Add Exp.              | a1 [DWORD Merc Id] [BYTE Amount]
a2    |    8 | Merc Add Exp.              | a2 [DWORD Merc Id] [WORD Amount]
a3    |   24 | Unknown                    | --
a4    |    3 | Unknown                    | --
a5    |    8 | Unknown                    | --
a6    |    * | Unknown                    | --
a7    |    7 | Delayed State              | a7 [BYTE Unit Type] [DWORD Unit Id] [BYTE State]
a8    |    * | Set State                  | a8 [BYTE Unit Type] [DWORD Unit Id] [BYTE Packet Length] [BYTE State] [VOID State Effects]
a9    |    7 | End State                  | a9 [BYTE Unit Type] [DWORD Unit Id] [BYTE State]
aa    |    * | Add Unit                   | aa [BYTE Unit Type] [DWORD Unit Id] [BYTE Packet Length] [VOID State Info]
ab    |    7 | NPC Heal                   | ab [BYTE Unit Type] [DWORD Unit Id] [BYTE Unit Life]
ac    |    * | Assign NPC                 | ac [DWORD Unit Id] [WORD Unit Code] [WORD X] [WORD Y] [BYTE Unit Life] [BYTE Packet Length] [VOID State Info]
ad    |    9 | Unknown                    | --
ae    |    * | Warden Request             | ae [WORD Packet Length Excluding Header] [VOID Data]
af    |    2 | Connection Info            | af [BYTE ProtocolVer]
b0    |    1 | Game Connection Terminated | b0
b1    |   53 | Unknown                    | --
b2    |    * | Unknown                    | --
b3    |    5 | IP Ban?                    | b3 [DWORD Param?]
b4    |    * | Unknown                    | --
MephisTools / diablo2-protocol

Formatting of packet wiki page... #61
