Unlimited Grenade Gun Ammo
You must beat the game three times and see all three endings. After doing that, the game will start with unlimited Grenade Gun ammo.
“Operation Wipeout” Bonus Game
You will get this secret mode if you beat the whole game in less than 5 hours. In this bonus game you will get a chance to kill all of the dinosaurs that were left alive.
Three Extra Costumes
When you beat the game for the first time, Regina will get a Battle and an Army costume. If you beat the game for the second time, she will get a Cave costume.