No revenue estimate for GOG — its rating/review counts don't calibrate to sales the way Steam's do. The Steam version is estimated at $16.6M — a different platform, not this one.

Katana ZERO

Katana ZERO is a stylish neo-noir, action-platformer featuring breakneck action and instant-death combat. Slash, dash, and manipulate time to unravel your past in a beautifully brutal acrobatic display. Exceptional Combat: Overcome your opposition however the situation requires. Deflect gunfire back at foes, dodge oncoming attacks, and manipulate enemies and environments with traps and explosives. Leave no survivors. Hand-Crafted Sequences: Each level is uniquely designed for countless methods of completion. Defeat foes creatively, using spontaneous approaches to eliminate your enemy as you see fit. Unconventional Storytelling: An enigmatic story told through cinematic sequences woven into the gameplay, twisting and folding to an unexpected conclusion.