Firefight!
This is Axiocranium with a twist. Map's the same, but there are lots and lots and lots of bobs, and with the enclosed physics model, some of them don't like you very much... You've got to figure out which ones. Nicely frenetic. Contains the original Axiocranium (v2), also.
Levels in map "Map":
Axiocranium v2
Levels in map "M2 Axiocranium v2":
Axiocranium v2