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My Classmates Left Me Behind in Another World, and Now I Have to Survive the Colosseum with the Worst Ability of All [v0.1] [RuinHouse]

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0.0 Rating 53 Views Updated Oct 10, 2026

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It’s an isekai story, but with a little twist: you can pretty much bang everyone.I’ve always been tired of isekai

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.

Thread Updated: 2026-10-10

Release Date: 2026-10-09

Developer:RuinHouse Patreon

Censored: No

Version: 0.1

OS: Windows

Language: English

Other Games: link

Genre:

Transformation, Fantasy, Milf, Male Protag, Slave, Real Porn, Sandbox,

Installation:

1. Extract and run.

Changelog:

v0.1

initial zone release

Developer Notes:

Now, a little heads-up!

The game is still in a very early stage, so there isn’t much story or content just yet. For now, you can max out your stats, have some fun experimenting with character transformations, and meet your very first harem member: Aldren!

You can transform him into either AJ or Ella. The choice is yours!

This is just the beginning, and there’s a lot more I want to add. I hope you enjoy this first little taste of The Colosseum!

For future:

I’m thinking about make a hentai version of this game, it makes sense for me because isekai is a genre almost of just anime.

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