Quicker
Not unlocked yetBuild 10 Quick Towers in one game
Rainbow
Not unlocked yetPurchase 9 Color Upgrades
Simple Strategy
Not unlocked yetWin a game with at least 30 Simple towers and no other types
Simplistic
Not unlocked yetBuild 10 Simple Towers in one game
Slow Demise
Not unlocked yetWin a game with at least 10 Quick towers each having the Slow upgrade
Spectraless
Not unlocked yetDefeat 200 Spectral enemies in one game
Supreme
Not unlocked yetWin a game on the Quad map with at least difficulty level 30 with no Sniper towers
Twin Rulers
Not unlocked yetWin a game with at least difficulty 30 within 2 minutes
Veteran Defender
Not unlocked yetBeat at least 25 maps