Must have PSP Games

What are Must have PSP Games ?

I got my PSP a week ago and right now i have

*Metal Slug Anthologie (lovin it)
*Daxter (didnt play it yet)
*Wipeout Pure (pretty fun but i suck at it)
*PoP Revalations (which is not so good compared to ps2 or PC versions because of technical issues)

>>2
meh, that game doesnt seem to work on my psp ..

>>4
i played the demo and honestly dont know why everyone is so crazed about lumines. Then again i have never been a big tetris dan either.

LocoRoco is fun, just not fun ebough to spend money on it.

And Tekken might be a cool idea if i had any friends to play it with.