Complete all 29 Wings of Liberty campaign missions on Hard difficulty.
Score the rank of Gold in all the challenge missions.
Complete all the Melee Combat achievements.
Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.
Win a 1 vs 4 Multiplayer Custom Game with no Allies against 4 Harder A.I. opponents.