Here is the full list of all 13 APB Reloaded achievements worth 1,000 gamerscore.
Successfully completed 100 missions as an Enforcer.
Assisted teammates by killing 100 enemy players.
Successfully completed 100 missions as a Criminal.
Spent a full day of game time opposed to enemy players.
Regenerated enough health to have healed you 99 times.
Killed an opponent in a vehicle with a grenade.
Achieved the MVP status at the end of a match 5 times total.
Sprinted 50km in total.
Earned by killing 50 opposing players as a passenger in a vehicle.
Earned by killing 500 players with a vehicle.
Earned by killing 10,000 enemy players.
Earned by winning 100 positive medals in opposed missions.
Earned by destroying 100 vehicles while the driver is at the wheel.