Grey-Box Testing

Grey-Box Testing turns a spare 3D test chamber into a job interview for chaos: move, jump, pause, and haul red cubes while looking for the flaw that opens the next room. Its game-jam scale keeps the idea compact, and the official page offers both an in-browser build and a Windows download.

What is Grey-Box Testing?

The joke is built into the rulebook. Walls, boxes, momentum, and even the pause button are less like dependable systems than suspicious witnesses. Each chamber asks you to stop behaving like a polite puzzle player and start poking at whatever looks breakable. That inversion gives the minimalist grey rooms a clear purpose: fewer decorations mean more attention for timing, object placement, and the odd behavior hiding in plain sight. The result is a small first-person puzzler with a gleefully crooked logic of its own.

What you can do there

• Probe test chambers for useful glitches
• Move, jump, pause, and carry red cubes
• Use broken-looking behavior to reach the next room

Why we picked it

Lots of games survive their bugs; this one hires them. The premise turns familiar platforming mishaps into an actual vocabulary for solving rooms, and its third-place finish in a 343-entry jam suggests the trick landed beyond the creator's own page.

How to get the most from it

Start with the listed controls, then treat E or P as a puzzle button rather than a menu shortcut. Keep an eye on red cubes, moving geometry, and boundaries that seem a little too confident. If the browser build feels rough, the page recommends the Windows download for a slightly better experience.

Good to know

The game expects a keyboard and mouse, and the page does not document touch controls or accessibility options. It is a compact jam project rather than a polished commercial campaign; player reports also flag high mouse sensitivity and occasional soft locks or trips outside the intended space. Plan for a little roughness around mouse feel and collision boundaries.

Who made it, and when?

Sam Hogan is the credited creator or organization. A documented update was recorded September 16, 2026.