For those of you familiar with these modes from when they first appeared in the Solo Pack for Super Stardust HD, you'll already know everything there is to know about the PSP add-on. The modes are similar to their PS3 predecessors and offer the same gameplay types, just in a modified format to fit the PSP. Endless mode pits you against a never-ending series of asteroids and bad guys, where things get progressively faster and more challenging as time progresses.