Explosive LoveG 10

This seems to be glitched in a positive way. I (and several others) received this achievement as soon as the third power was unlocked, there was never a need to use all 3 powers.

Explosive Love G10:
Use all 3 powers in 5 seconds or less.

This one is easy, you just have to get far enough to unlock all three powers (Bomb, Shield, and Berserker). The first two come pretty quick but the third comes a little later on. After unlocking all three powers, make sure you enter a level with at least one of each and then hit each arrow key one after the other. It may have just been my keyboard but hitting all three arrow keys at once didn't work but you have more than enough time to activate all three anyway.