>>403985258
>MTF
Spawns with weapons and lvl 2 keycard, wears black military gear. Has to kill the SCPs and chaos insurgents, extract the scientists, and extract class Ds after arresting them or kill them if they fail to comply.

>scientist
Spawns with lvl 2 keycard, wears a lab coat. Has to reach the surface and escape. Respawns as MTF if successful. I think that also respawns all dead players as MTF at the same time, but not sure.

>D-class (prisoners)
Spawns with nothing, wears orange jumpsuit. Has to evade MTF and escape. Respawns as chaos insurgents if successful and probably respawns dead players as chaos insurgents too. If arrested and extracted, respawns as MTF.

>Chaos insurgents
Same as MTF but with the opposite objectives: extract class-Ds, kill scientists and MTF. Wears green military gear. I think they're not allied with the SCPs, but not sure. None of these spawn at game start.

>SCPs
I didn't get to play as these, so I may be wrong on details. This >>403981263 one can only move when unobserved and can force others to blink. There's another that can sink through the ground to hide and can send you to a maze that drains your health until you escape. There's another who looks like a plague doctor and can revive dead humans as zombies, not sure how it attacks. The zombies can use pistols. The objective of the SCPs is to kill everyone else.

There were some other mechanics like one of the floors getting gassed periodically, but I didn't really understand how it worked.