Complete all the Mar Sara mission achievements.
Beat the Terra-tron on the Lost Viking arcade machine.
Prevent the Protoss from capping a Tal’darim Altar in the “Welcome to the Jungle” mission on Hard difficulty.
Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.
Complete all 29 Wings of Liberty campaign missions on Hard difficulty.