Costumes- There are 3 types of clothes:
Spy- beat the game once.
Cave Girl- beat the game 2 times (your guns look different, shotgun/handgun are bones and a stick put together and the grenade launcher is a giant fish).
Weird Type- beat the game 2 times.
Bonus Game- Beat the game within 5 hours and the bonus game is where you kill all the left dinos.
Infinite Grenade Ammo- Beat the game three times.