My Classmates Left Me Behind in Another World, and Now I Have to Survive the Colosseum with the Worst Ability of All
by RuinHouse
About My Classmates Left Me Behind in Another World, and Now I Have to Survive the Colosseum with the Worst Ability of All
You play the protagonist, left behind in another world after his classmates move on, forced to survive in a colosseum while dealing with a weak ability. The game takes an isekai premise and lets you pursue relationships and power in that setting. It is an adult HTML RPG by RuinHouse, with animated art, and it combines combat, transformation, and harem-building in a playful, adult-focused story. You make choices as you grow stronger.
The current build is v0.1, released on October 9, 2026, and development is ongoing as of this version rather than finished. It runs on Windows, is available in English, and is uncensored. This latest update adds an initial zone release, giving players the first playable area rather than a completed full game.
Developer's description
It's an isekai story, but with a little twist: you can pretty much bang everyone. I've always been tired of isekai anime where the protagonist is some shy, clueless virgin who never makes a move. So I wanted to make something different. Here, you'll get to do all those things you've probably imagined doing if you ever ended up in an isekai world. The Colosseum is all about transformation, combat, and building your own harem. You'll fight to survive, grow stronger, and bring new people into your personal harem along the way.
My Classmates Left Me Behind in Another World, and Now I Have to Survive the Colosseum with the Worst Ability of All screenshots
Download My Classmates Left Me Behind in Another World, and Now I Have to Survive the Colosseum with the Worst Ability of All v0.1
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