Here is the full list of all 12 REAL STEEL achievements worth 200 gamerscore. It takes around 8-10 hours to unlock all of the achievements on Xbox 360.
Win 100 RANKED MATCH on Xbox LIVE.
Win 50 RANKED MATCH on Xbox LIVE.
Win an Xbox LIVE RANKED MATCH against a robot with TBR x2 or higher than you to earn a huge prize.
Win 10 RANKED MATCH on Xbox LIVE.
Win 1 fight on Xbox LIVE.
Complete all WRB STAGES in MATCH MODE.
Complete all UNDERWORLD STAGES in MATCH MODE.
Beat an opponent robot by destroying both of its arms.(Excludes Local Multiplayer Mode)
Win a match in a single round.(Excludes Local Multiplayer Mode)
Win a match without completely depleting your power a single time.(Excludes Local Multiplayer Mode)
Win your first fight in the UNDERWORLD.
Customize and save a robot to a garage.