Keep 10 Twin Sunflowers alive in a single level.

Complete a level using only explosive plants to kill zombies.

Stop the horde using only the Sunflower, Wall-Nut, and Chomper on any level

Hammer the point home

Complete Comet Kreios Area 7 at Normal difficulty.

Clear all 12 maps.

Accumulate a total score of 100,000 points.

Clear a map without deploying a Thief or losing a single crystal.

Clear all the maps in W1.

Clear a single map without losing any crystals.

Clear wave 20 on any single map.

Beat the game in under 40 minutes.