Here is the full list of all 20 Neon Seoul: Outrun achievements.
Get into the game rook
Enter Free-Ride mode and earn your stripes
Test your meddle on the Seoul Highways
Recharge your overshield
Get into the boost and feel the speed
Escape those pesky cops
Beat your own record 3 times
Watch a video in the lobby
Race a total of 100 kilometers
Launch a car into the air
Get two near misses in traffic
Hit that Max Boost speed
Hit that Max Boost speed for 10 insanity-filled seconds
Score 5,000 Points
Score 25,000 Points
Score 50,000 Points
Score 100,000 Points
Score 250,000 Points
Score 500,000 Points
Score 1,000,000 Points