The rewards for a homebrew developer's labor are few. The majority of their games and applications will never see a commercial release or any cash return. The number of people who can even appreciate their work on the DS is limited because of hardware requirements (i.e. third party storage carts). To find out why these programmers pour countless hours into projects that they won't likely profit from, Modojo interviewed the minds behind four of the homebrew scene's most visible games: Tetattds, Tower Defense, The Lemmings Project, and QWAK.Tetattds is a polished clone of Tetris Attack/Panel de Pon for the SNES, adding online support to the puzzler. Tower Defense is an adaptation of the popular Warcraft 3 mod. The Lemmings Project jerry-rigs the PC classic to work with the DS' touchscreen and resolution limits. QWAK, a GBA puzzle platformer reminiscent of Bubble Bobble, was actually self-published with a small run of 300 carts.
So what is it that drives these homebrew developers? Several of them cite community participation or the need to fill a gap in the DS library. Others have a reason that's even more simple and obvious: They just want to make the best games they can.
If any system is well-suited to guiding chains of lemmings through levels filled with danger, it's the DS ... and thanks to 
