A mod for classic Serious Sam: The Second Encounter v1.07 that adds a lot of options for multiplayer games including coop mode support for singleplayer maps.
Upon switching levels, enemies from the previous level are not cleared from the counter. Either that or they're not being counted upon joining the game (setting them to 0 and only counting new ones).
Upon switching levels, enemies from the previous level are not cleared from the counter. Either that or they're not being counted upon joining the game (setting them to 0 and only counting new ones).