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Mhh, I remember having a few games that actually came with a dedicated version for both Windows and Linux, unfortunately I don't use Linux thus I usually delete those to save some hard drive space. :/

On the spot I can only point you towards this however I'm not sure it's still seeded and I'm pretty sure it's a visual novel. Sooo... mostly text with a few H-CGs.
I'll tell you next time I come across a proper game including a Linux version.

Hi again, I looked through my folder of games I didn't play yet (thus I didn't delete possible linux versions).
First game I found is this. Happy Campers.
hcbannersteamad.jpg
Appears to be a visual-novel style of game.

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Second one is this. Magical Arena.
Bild2.png
It's an RPG based game.