Smash 10 or more gems in a row.

Destroy 5 gems with inverted controls.

Don't use the speed up against a boss.

Try not to collect bonuses in a level.

Clear a level in 20 seconds or less.

Collect 10 or more bonuses in a single level.

In Multiplayer, fully suppress 5 enemies

In Multiplayer, as a squad leader call in 2 reinforcements in a round

Play a round of Conquest on each of the launch maps

In Multiplayer, perform 10 squad revives

In Multiplayer, kill 10 enemies with secondary weapons in a round

In Multiplayer, have 3 squad members spawn on you