The Nintendo DS continues to be the home of homebrewers and hobbists that use the portable console to run unofficial software. The most popular programs include digital painting applications, ports of operating systems (such as Linux or Mac,) emulators, media players, calculators, web browsers and so on and so forth. Interestingly, the latest project allows homebrewers to run a rudimentary version of Portal on the Nintendo DS.
Although the creator points out that this version isn’t exactly playable yet, the unofficial adaptation features some of the most characteristic elements of the game, such as the Companion Cube, turrets, platforms and of course, portals. For a more through description of this adaptation read the notes on YouTube.