Module 1:
Right after habitation turn left, there will be a stack of crates, climb it and find the module on the floor

Module 2:
In the mess hall, climb the stairs, find a unlocked dorm, inside the left desk's drawer has a module inside. to unlock the drawer, find the flower pot in the dorm's kitchen and absolutely obliterate it with your .357 Magnum, keep shooting it until you find the key underneath it

Module 3:
Before proceeding go through the entrance of the Greenhouse then immediately turn and walk to the right, there you will find a swamp, approach the blue cart and yellow lid crate then jump over them and the railing, in the middle of the swamp is a keycard. Proceed to the control room, turn hard right and find a vent behind a whiteboard. keep going inside the vent until you reach a abandoned sector of the station. there you will find a keycard reader, inside is the module. Once you have the module find another vent and go through it, Locate the control room again and then start Armageddon



Getpos commands for anyone lost or lazy: (use sv_cheats 1 and press noclip to teleport)
1: setpos 6292.414551 3680.790283 -159.968750;setang 49.432919 -51.217838 0.000000
2: setpos 3848.271973 2763.459961 32.031250;setang 45.923927 -69.972649 0.000000
3: setpos 12261.373047 53.708488 -1583.968750;setang 46.040485 -68.027107 0.000000