10$man has released the signed version of Spacial Warfare which is a homebrew game for your PSP. The game is similar to the arcade classic Asteroids. Since this is the signed version you are not required to be running CFW and can play this on OFW 6.35 and higher.
Here is what 10$man had to say about this release:
"What happens is, there is 3 levels of depth. You can maneuver up and down between these levels in your Space Ship. Enemies will fly at you and you must shoot them. If they touch you, then you lose 10 health. Once you have survived for 200 time then you will be tooken to the Shop. In the Shop you can buy either 5 mega Bullets, A string gun (It creates a string of bullets that are released when you stop holding the fire button), or an engine upgrade. I will be adding more upgrades as time progresses.
Dpad right-Move right
Dpad left-Move left
Dpad up-Go down a level
Dpad down-Go up a level
L-Shoot mega Bullets (if you have some)"