Most collections include the Special Edition stages which weren't available in the initial arcade release.
For a legitimate experience, consider playing the original arcade release or the PS3 version via official backward compatibility (if available on newer consoles). Deadstorm Pirates Pc Game Download - Collection
The game is designed for two players. When both players aim at the same target, their shots combine into a powerful "Combination Shot." Most collections include the Special Edition stages which
can launch the original arcade game files on modern Windows systems. Unofficial PC Repacks: Deadstorm Pirates Pc Game Download - Collection