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Range
Increases targeting range so the tower can hit enemies farther away.
⚡
Damage
Increases the damage dealt by every shot fired.
↻
Fire Rate
Increases how many shots per second your tower fires.
✦
Multi-Shot
Fires additional projectiles in a spread with every shot.
✚
Repair
Instantly restores 30 hull health. Can be bought repeatedly.
➹
Pierce
Projectiles pass through and hit an additional enemy before disappearing.
◈
Shield
Permanently increases max hull health and heals the difference immediately.