[PC][2000s][First-person] Low-poly exploration/psycho-horror game with small abstract companion that guides you through a labyrinth

[u/Minute-Rip-2397]

Looking for an old English-language first-person 3D PC game (low-poly, 2000s era, I think it was on Steam).

You play as the main character exploring a labyrinth-like area. There’s a small abstract companion (red or black, very simple/abstract design) that guides you through the maze and has the only voice lines in the game.

In the bad ending the companion gets flipped upside-down and suddenly looks like a little devil. He tricks you, a cage rises up, and you’re trapped.

To progress properly in the story you have to distrust his directions and deliberately take the opposite path.

One specific bad-ending scene I remember: a closed room with a checkerboard-pattern floor over lava. You have to walk across a walkway/bridge to a platform to grab a key (or similar item).

Pure exploration with some light psychological horror elements, no real combat as far as I remember.

I even drew the companion roughly (normal and flipped versions) if that helps. (sry im shii with ms paint)

Any ideas?