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 $321.7K — a different platform, not this one.

Zwei: The Ilvard Insurrection

In a world where magic and technology exist side by side, vampire princess Alwen must reclaim her ancestral castle and her magic alongside her unlikely ally, treasure hunter Ragna Valentine. They may make for an odd pair, but when they combine their talents, the sky’s the limit! Two Playable Characters for Tag-Team Action No need to go it alone when you’ve got the power of two on your side. Ragna roughs up foes in melee range, while Alwen fires off salvos of powerful magic or locks down enemies from afar. Switch between the two on the fly to create crazy combos! Unique Food-Based Experience System Gives Greater Control Over Leveling Experience is gained through eating food, so you can choose to cash in immediately, or save it to trade later for food worth even more EXP. You can even beat the game at level 1...if you dare. Strange and Quirky Setting with Strange and Quirky Characters The residents of Ilvard are a lively lot, and you can learn more about each one in your spare time as the story progresses. What’s the deal with that chain-smoking nun? Which of the three maids shirks the most work? And... is that a girl in a giant penguin costume? Brand New, Expanded English Voices We’ve greatly expanded on the Japanese release’s voice acting, with over 2000 never-before-voiced lines bringing the twists and turns of the main story to life.