I used to work for a video game company, and we produced a puzzle game that involved heavy use of colors. I pushed very hard to include a "color blind mode" wh

I used to work for a video game company, and we produced a puzzle game that involved heavy use of colors. I pushed very hard to include a "color blind mode" which added shapes to the tiles. An interesting side effect is that you could play faster in color blind mode, because we used 2D sprites for those pieces instead of 3D models. Without the animations you could move faster. We were also working on this other "game" (a PDA for the NDS) which included a bunch of mini-games, one of which heavily relied on identifying colors. Unfortunately I was not able to convince them to make a color blind version. The game was targeted at girls who are far less likely to be color blind than boys, and the game was only a very small portion of the product overall.