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A Simple Expurriment is a combat-free metroidvania that replaces traditional action with stealth, exploration, and puzzle-solving. You play as a mother cat who has stowed away aboard an alien spaceship to rescue her three genetically modified kittens from an extraterrestrial corporation. The premise is quirky but grounded: the cats are subjects of an experiment designed to understand their mysterious influence over humans, and things grow increasingly strange as you progress.

The core gameplay loop centers on two interconnected systems. First, you acquire new feline abilities—wall-running, liquid transformation, and enhanced jumping—that unlock new areas of the ship. Second, you manipulate sections of the environment like sliding puzzle pieces, physically rearranging the ship's layout to create new paths and solve environmental challenges. This dual approach to exploration means progression relies on both character upgrades and spatial problem-solving rather than combat encounters.

The game features four main areas to explore: the Research Area, Maintenance Area, VIP Area, and the corporate cafeteria. Each presents distinct environmental puzzles and stealth challenges. A crucial decision partway through the game branches the experience into two divergent paths, each with different obstacles and a chaotic final challenge. Both routes lead to distinct endings, encouraging multiple playthroughs.

What sets A Simple Expurriment apart is its deliberate restraint. Rather than sprawling for dozens of hours, a complete playthrough takes 5-6 hours, with an additional hour to see the alternative ending. The design philosophy prioritizes respecting players' time while delivering a focused, satisfying experience. The game is entirely AI-free, with all art, code, and writing created by solo developer Gustavo Galembeck of Flat Voxel.

This title appeals to players seeking exploration-based puzzlers without combat, fans of metroidvania design who want something unconventional, and anyone drawn to charming, character-driven indie games. The cat-themed premise and colorful alien world create an inviting aesthetic, while the puzzle mechanics and branching narrative provide meaningful depth.