German homebrew developer ValleDalle just came up with a game inspired by the classic desktop title Tower Defense. It's aptly called PSP Tower Defense and is currently on version 1.31. This particular creation should not be mistaken with TacticalPenguin's PSP Tower Defense released during the recent NeoFlash Coding Competition.

Anyway, you all know how these kinds of game go - you are given a battlefield at first. You set up your towers strategically around it and then you let the enemies come to you. The objective of the game is to score as many points as possible by blowing up moving targets. ValleDalle provided the following information about this build (translated):

* Several opponent types (unfortunately so far only opponent those continue to increase, but with two surprises in the waves)
* More stages of development of the towers
* Exact in-game guidance
* Difficulty stages (thus options at all)
* The sounds improve (I had futile tried, but LUA seems to come with this play anyway to the borders and has unfortunately no more power over also still sound to play clearly)

PSP Tower Defense doesn't come with a documentation but the menus provided in the game should provide you with all necessary information such as enemy type, tower type, and key map among others.