Tomb Raider Legend is the first Tomb Raider game on PSP. It's said to be nearly identical to the PS2 version and has proved to have excellent graphics. Unfortunately, unlike the other platforms, the PSP version did not hit stores until 5th May.
The PSP Version of Tomb Raider Legend included many exclusive features like new Outfits and mini-games.
Tomb Raider Games For PSP
Though many fans would of liked it, Tomb Raider Underworld was not released for the PSP. The has been no indication of a future release.