Iron Man - Learn how to operate your walker and complete Bootcamp.
Second in Command - Defeat General Brutus by destroying The Excavator.
You Never Walk Alone - Complete an area in co-op.
Take it to the Max - Fully upgrade your walker.
Green Peace - Don't push over any trees in Tresspassers.
Thunder Struck - Destroy all lightning harvesters in Fog of War.
Mine! Mine! Mine! - Don't take any damage from sea mines in Tide of Battle.
Back to Retirement - Defeat Julius Steelwell and save the world by destroying The Butler.
Veteran - Complete all areas on the hardest difficulty.
Gladiator - Clear all Survival mode arenas.
Survival of the Fittest - Complete a Survival mode arena without losing a life.
Can't Touch This - Complete an area in Katharsis without getting hit.