KreisReise is a difficult f2p action metroidvania. Each section is a cylinder surface, i.e. 2D with horizontal wraparound. The name is German for "CircleJourney".

An interquel to Steins;Gate that branches off from the main route. Continues the time travel theme, while focusing on Kurisu's research project from before the start of Steins;Gate.

A cute 2D platformer. The gravity for the player character can be inverted with a button press.

A Lovecraftian "geometric horror" 3D game. The player has to avoid low-poly monsters while constantly falling.

A 3D platformer with simple geometrical objects. It has a grappling hook mechanic, and it's possible to stick to certain surfaces.

A platformer where white zones have downward gravity, and black zones have upward gravity. The player can pass through the ground with a button press, allowing to switch between black and white zones.

A collection of various physics-based space-themed minigames, where you have to use gravity to your advantage.

A sidescrolling puzzle platformer where it's possible to fix the screen position, and then move between the left and right border.

A collection of several 3D Sokoban variants.

A free-to-play 3D version of Breakout / Arkanoid. The player moves on a circle around the play area, while the altitude automatically adapts to that of the ball.