Guide a tiny blob through dangerous test chambers filled with lasers, switches, and toxic goo. Use portals and physics-based mechanics to solve puzzles and reach the exit. A clever blend of platforming and puzzle-solving that rewards patience and timing. Along the way you'll trigger pressure plates, redirect lasers with mirrors, and time your jumps between crushing pistons to keep your blob in one piece. Each chamber introduces a new mechanic, layering fresh challenges on top of what you've already learned so the difficulty ramps up naturally. Death resets you instantly, encouraging quick retries and trial-and-error experimentation rather than punishing mistakes with long waits. It's a satisfying mix of reflexes and problem-solving that keeps every stage feeling like a fresh puzzle to crack. If you like this lab-bound challenge, try the spinoff Test Subject Arena for combat instead of puzzles, or Fleeing the Complex for another tense facility escape.
Use arrow keys or WASD to move Test Subject Blue through the lab. Jump with the spacebar and interact with objects using the E key. Navigate through increasingly complex test chambers, avoiding hazards and solving puzzles to reach the exit. Study each room before moving, since many hazards only activate once you cross a certain point or trigger a switch. Timing is everything around spinning blades and retracting platforms, so watch their patterns before committing to a jump. Don't be afraid to restart a chamber the moment you sense a mistake, since retries are instant and cost nothing.
