Motionsports Adrenaline
44 Achievements
PS3
One-sided
Play 25 competitive two player events
10.5%
How to unlock the One-sided achievement in Motionsports Adrenaline - Definitive Guide
This one can be a bit of a grind since you have probably only completed 9 or 10 of these competitive races so far. If you get bored you can leave the two controllers sit and it will still complete the race. You will have to come back to restart each race though. The trophy will unlock after completing your 25th race.