It's described in some older comments. How did you get the second one though??
I mean, the endings are as follows:
The cheese steak ending: Refuse to give up malO at the last moment.
Box malO: Keep malO in the box.
Death?: Do what malO asks at the last moment. fredi fazber.
Death: Do things that get you killed near the end of the game.
My opinion on the symbol is as follows: Taking nothing to mean the world "lives", X to mean the world "dies", and / to mean "uncertainty".
The last one is more iffy, but it could refer to you being "inside" malO? In more ways than one.
I don't think chapters 1 or 2 actually pertain at all to the ending.