CheatCC says, "A two-player co-op mode would be a great addition, as there just isn't enough variety to give this game much replay value. Survivor mode lets you shoot waves of dinos to your heart's content, but you should tire of it after a few hours. It really shouldn't take the average player longer than an afternoon or two to complete the game
, which brings me to the dilemma of whether to recommend this game as a purchase or rental. You'll become less bored if you only spend an hour with it each time, but at the same time it's not really worth the full price."