is available as a free download on Steam .

: The mobile "Free" versions use ads and in-app purchases (IAPs) to unlock specific ship types (e.g., Phantom, Homing, Blade). The Steam paid versions generally include all ship types without further cost.

. Stage 1 is free; later stages/ships require payment.

: You can find official free downloads on the Apple App Store and Google Play Store . Steam Versions :