sabotage server room (destroy everything) (upsets IS team)
(Jordan says he's seen simon and john acting suspiciously asks you to check in with Alice and then follow john)
get holy water from Alice (you must be aware something else is going on by now right?)
follow john to plant room
(john gets possessed and starts attacking you)
heal john with holy water (provided by either alice or jordan), receive key to get out.
(john becomes first major follower)
obtain (and read) book of summoning (discovered in plant room)
collect 5 candles
collect some blood (ideally non-human)
find underground area
destroy power lines to building (causes every indoor location to go dark)
build enough of a support following to battle and heal for you (3 followers)
stock up on weapons and medical equipment
weaken simon with poison (optional)
attract simon to cave (probably by getting him so angry he follows you
perform summoning ritual - battle simon to ~10% health and push him into portal.