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