Win a chapter 4 (or later) mission with level 3 towers only and no selling.

Build 20 towers of any type in one mission.

Win a mission with at least 5,000 resources remaining.

Save a core that is less than 10 seconds away from the map's exit point.

Kill an alien carrying a power core.

Kill 100 aliens.

Use the speed up control for a total of 60 seconds in any mission.

Upgrade a tower.

Kill 1 alien.

Use the Orbital Laser Special Weapon (General Cai).

Score at least 1 million points on any level in Adventure Mode

Beat a player with a higher rank