Shakma 1990

An experiment that is supposed to reduce aggression has the opposite effect on a baboon that is being experimented on by a group of medical students and their professor. While they are playing a fantasy role-playing game in their research facility, the baboon escapes and begins hunting them down.

FS DVDrip

NOTE:
Not the best quality, but movie is hard to find, so I thought I'd share.
Not my rip, so please don't complain about quality.