Marvel Avengers Battle for Earth

The secret to most of these "perform this move" achievements is to go right to the challenge section and take the tutorial. The tutorial will force you to perform a lot of these actions, and the achievement will count as you do them.

This is won when you perform a launcher super attack (always the one on your left) followed by another super attack to chain together a 2 hit combo. As you play with the different characters, you'll find a few that you like. Personally, I find Magneto's motions very fluid, and can easily perform continuous 3 hit combos with him.