Lockdown allows you to password protect your PSP from prying eyes. It also protects the Recovery Menu so that the protection can't be disabled without considerable effort (or by unbricking). Read more about Lockdown v2.0 (PSP Application)
In the platform game Gannatsu Portable you have to collect items floating around the whole level. But you don't only jump around, because you also can use a grappling hook to reach your goals or jump higher. Read more about Gannatsu Portable v1.04 (R1)
Kurok is a game using a heavily modified quake engine designed especially for the PSP, and later on if there is enough demand, a PC version. Read more about Kurok v0.3 (Demo) (PSP Game)
In the platform game Gannatsu Portable you have to collect items floating around the whole level. But you don't only jump around, because you also can use a grappling hook to reach your goals or jump higher. Read more about Gannatsu Portable v1.04 PSP (R1) (PSP Game Port)
Stakker PSP is a fun game of building up and destroying towers made out of falling blocks. Build up your tower on the platform and don't let any piece fall off. If you reach high enough, destroy it with a projectile coming from the left and get points for each piece falling off the platform and bouncing against the screen borders. Read more about Stakker PSP (Idol Edition)