If the player was to move the gun off target whilst still charging up or fully charged up the gun, the charger will begin to move down again. Once the gun is fully charged, the spacebar can be used to temporarily put the animal to sleep. The player must wait for the gun to charge up, whilst keeping a steady aim. In this mode, the player wields a tranquilizer gun in zookeeper mode and must attempt to subdue the rampaging dinosaur. However, the player can prevent such disasters by locating the problem and then entering tranquilizer mode. This causes it to go on a rampage, where it will destroy its exhibit, then break out and attempt to destroy the zoo. This mode is only available when a dinosaur becomes upset with its living conditions.
These are as follows: discovering fossils, curing diseases, recreating extinct animals, building skeleton jigsaws and tranquilizing dinosaurs.
Several new minigames (similar to the trick training games in Marine Mania) are included.
