Currently, there are four Ape Escape games playable to PS Plus Premium subscribers. Ape Escape, Ape Escape 2, Ape Escape: On the Loose (a PSP remake of the original game), and Ape Escape ...

You first only have a single difficulty mode in High tech Coloseum and there are two more to unlock. Each one have a new final boss (the last one have 3 special boss).