Here is the full list of all 29 Slipstream achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Complete everything.
Win a race with every car model in Quick Race Mode.
Win a cannonball race of all 5 secret tracks, in any order
Win a cannonball race of all 5 nighttime tracks, in any order.
Defeat Alex in Metropolis.
Defeat Camilla in Highgate Cemetery.
Defeat David in Neon City.
Win a cannonball race of 15 tracks.
Defeat Tofu Boy in Akagiyama.
Defeat Norman in Parthenon.
Win a race in Grand Prix mode without any car upgrades.
Reach every exit defeating all the rivals along the way.
Complete all possible routes in Arcade Mode.
Defeat every rival character in Arcade Mode at least once.
Defeat all the rivals in a cannonball race of 5 or more tracks.
Get to all the exits in Arcade Mode.
Visit all the tracks in Arcade Mode.
Defeat all the rivals in a single Arcade Mode run.
Win the Diamond Cup.
Win all the races in all cups.
Win the Emerald Cup.
Win the Sapphire Cup.
Complete a stage in arcade mode without touching anything.
Stay on the slipstream for more than 15 seconds in any mode.
Win a cannonball race of 5 or more tracks.
Win a battle royale match.
Win the Ruby Cup.
Win all the races in any cup.
Get to the finish line in Arcade Mode.