@thepaleunknown Finding discoveries gives 1 point. 20 points or more is the justice ending. 19-0 is the forever ending. <0 is the abandoned ending. I did my second playthrough and killed only one enemy (that wasnt the fallen)
@thepaleunknown Everytime you use a revive you lose points towards the good ending. Everytime you fail the surgery puzzle as Zoe you lose points towards the ending. Being in the surgery room for an extended period of time also slowly drains points. Killing enemies loses points.
@blackheart59_ I mean its pretty popular to do across multiple different genres with online components. Shooters and MMOs have loads that sell their acct with certain cosmetics, achievements, etc