Sonic DS is an unreleased game for the Nintendo DS. It was shown during the May E3 convention in 2004. The UK based Official Nintendo Magazine ran a piece on it which praised its visuals as being the best on the DS, but also criticized it for having basic gameplay. The magazine compared it to being the Nintendo DS equivalent of the 100 meter button dash. Eventually the game was cancelled and Sonic Rush became the first Sonic game for Nintendo DS.
To play the game, the player uses the touch screen with a stylus or their finger. They can move faster by swiping their finger/stylus from side to side as quickly as possible. They can also jump by tapping on the top of the touch screen.
After the player reaches a certain speed, the screen will say "SONIC Speed 1" and everything on the screen except for Sonic will have its colors inverted. There are multiple levels of "SONIC Speed" that the player can get by going even faster.
On the upper screen, the player can see the number of Rings they have collected, the "Highest Record Today", and "Your Record" which is just the timer.
When the player reaches the finish line, they get given a rank according to their SONIC Speed, Rings, and Time, and a splash screen pops up that exclaims "Keep an eye out for SEGA's titles on the DS!"
- The level shown seems to be Seaside Hill from Sonic Heroes.
- Had Sonic DS not been cancelled, it would have been the first portable Sonic game to have fully 3D gameplay. It wasn't until Sonic Lost World, which came out years later for the Nintendo 3DS, was the first portable Sonic game to use completely 3D gameplay.
- In the E3 2006 demo of Sonic and the Secret Rings, known at the time as Sonic Wild Fire, after the results screen Sonic does a pose identical to the one from the results screen of this game. It was likely reused from Sonic DS as it was only present in the E3 demo.
- Although not likely, Sonic DS could have served as an idea that would later be developed into similar gameplay used for the Mario & Sonic series, in a vein similar to how Sonic Crackers on the Genesis became Knuckles' Chaotix, and how Sonic Extreme on the Xbox became Sonic Riders.
- Sonic Dash shares several similarities with this game; both are set in Seaside Hill, both feature 3D third person gameplay, and both were designed for handheld platforms.