First level completed

First tower upgraded

First 5 levels completed

First 10 levels completed

First 20 levels completed

First 45 levels completed

First 65 levels completed

Complete the campaign

Upgrade 5 towers in a single level

Kill 3 enemies with a single shot

Kill 5 enemies with a single shot

Kill over 100 enemies in a single level

Kill over 250 enemies in a single level

Kill over 500 enemies in a single level

Kill over 1000 enemies in a single level

Kill over 2000 enemies in a single level

Finish one level of the extended campaign

Complete the extended campaign

Finish one coop levels

Build a level with the level editor and finish the level

Finish a level with only lasers

Finish a level with only rocket launchers

Finish a level with only big guns