I recently heard about Turok: Rage Wars cause it had an exclusive grey cartridge thing that the developers give you if the game was glitched on the N64. I searched up gameplay, it was cool, but there was one thing that catches my eyes. There was this gamemode that let you be a Chicken, a Monkey or a Lizard. The creature was defenseless and couldn't harm anyone. Their goal was to get to a blue panel in the middle of a map without getting killed. If they get shot twice (in Turok its once but I did twice to make it easier) they die. While the person gets 1 point. If the creature hits the blue panel, they turn back into a person and the round ends. There is a time limit of 2 minutes. Next round, another person is selected to be the creature.
Gameplay of this gamemode in Turok: Rage Wars:
http://www.youtube.com/watch?v=aVZPytoCH7oI know my suggestion is not 100% like Turok but still similar.