to start playing immediately—no formal installation is required. New "Apes vs Helium" Update: Multiplayer and Mods
and locate the file named Apes vs Helium.exe (often featuring a bloon icon).
Because it is a fan-made project, is not available on major storefronts like Steam. You can find the game on community-driven platforms:
While the original game has largely finished development, a "new" version often discussed by creators like Tewtiy is actually a mod for a different game. Apes VS Helium by MDTOWERZ GAMES - itch.io
The installation process is straightforward as the game typically comes in a portable .zip format: from one of the sources above.