Coined by Ross Scott of
Accursed Farms, it refers to when a
video game makes you feel insane because
something which you've done/seen before is now suddenly completely dfferent, or no longer works for seemingly no reason.
Jack: So how was Sonic Heros?
Ronald: God, so mixed, it was giving me serious Gamer Dementia!
Jill: Did you get through
Hellgate London at all?
Steve: Fuck no, it seemed like I was going insane, stuff was
randomly changing!
Jill:
Sounds like it was giving you a real case of Gamer Dementia!