This is a pretty big one, I think. It can be rectified using saves, but even so.
One of the doors of the elevator leading towards the coolant tank area (just after acquiring the Gluon Gun) can get jammed if the player steps back, and it won’t reopen.
This is the elevator where a pack of Houndeyes spawn just after you exit. I think it’s safe to assume players might backpedal into a safer corner (aka the elevator) and get stuck.
[code]setpos 107.593750 1313.062500 32.031250;
map : bm_c3a2c [/code]
Pressing use on the door and the elevator button doesn’t open it, and neither does walking up to it. It makes a default “locked door” noise.