Years ago, back when I was a Steve Jackson Games demo monkey during the heyday of GenCon SoCal, I ran this GURPS adventure where the characters were all tourists in Disneyland when a zombie outbreak happens. The set-up is that the Pirates of the Caribbean ride breaks down, and by the time they get back to the surface, Shit Has Happened. The game has few zombies to start, and it ramps up as time goes on (and, though this reveals a secret about how I run it, as the group makes poor moral choices & bickers).
Really, I wasn't running anything but a very, very light GURPS game and put most of the weight of the game on my shoulders. I recognize that now, but I want to run this again (potentially at Orccon in February) because it's a hell of a lot of fun. But, I don't know what system would work for it, and I'm not particularly interested in GURPS anymore.
I used to think Don't Rest Your Head was the answer, because I really, really like that game. But, the more I think about it, the more I realize that the strength of a DRYH game would break a survival horror game -- the former involves heavy use of character agency & the option of super-competence, whereas the latter is a genre of denying character agency & and being overwhelmed by a situation compared to their competence level.
I'm also not looking for a game that deeply mechanically explores the emotional/mental state of a character in the situation. I'm not looking for the survival horror version of Grey Ranks, for instance -- at least, not for this.
So, with all that said, any thoughts on what games I should be looking at?