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 $3.8K — a different platform, not this one.

Fire Shark

Toaplan Arcade Shoot'em Ups 2 bundle Toaplan's 1989 vertical shmup classic Fire Shark rises from the ashes, armed to the teeth with a brand-new beginner mode, online leaderboards, quick saves and much more! In this sequel to Flying Shark/Sky Shark, you control the incredible power of homing missiles, rapid-fire machine guns, free-falling bombs, and high-tech lasers. In Japan, this game is known as “Shark! Shark! Shark!” (or “Same! Same! Same!”). "On a parallel Earth in 19X9, a malevolent superpower seeks to conquer every region on the map. All seems lost until a super-powered biplane emerges from the smoky haze. It's the only pilot capable of saving a billion lives… The gleaming FIRE SHARK!” ORIGINAL GAME FEATURES: Endure white knuckle shoot-’em-up action throughout intense stages and boss fights! Despite its simple appearance, it's jam-packed with Toaplan action if you're brave enough to play. Set the skies ablaze with the Super Fire, a powerful weapon whose blast resembles the legendary phoenix's wings! Fly solo or invite a friend to the skies in co-op. Marvel at the stunning graphics and beautiful settings in this arcade classic. QUALITY OF LIFE IMPROVEMENTS: Minimal Input Lag: Emulation, input processing, and rendering all complete on the same frame. Quick Save using F1-F10, Reload with Shift+ F1-F10 Online leaderboards for Single Credit, No Assist, and Assisted plays. Instrument panels with extra gameplay information and artwork. Rewind the game between 10-18 minutes, depending on the action. Experience the game in Mirror Mode Capture sharable replays to immortalize your interstellar victories (or funny moments). Assist Features such as auto-fire at multiple rates. Very Easy Mode: Lower the difficulty to breeze through the adventure. Pixel perfect or full-screen scaling in windowed or full-screen mode. Rotate the gameplay in 90-degree increments. Achievements Hone your skills in the ultra-customizable practice mode!