Definitely PSP:
- FF7 Crisis Core
- MGS Peace Walker
- Kingdom Hearts BBS
- God of War (both games)
- GTA
- Persona 3
...too many more to list but to me it was the first time I felt like I was playing a home console on a portable device.
It also had the PS1 classic games, it was a media player, was able to hook up to TV to play on the big screen,
(Then there's the icing where it can be modded and to let you play tons of emulated games)







