Thomas Was Alone

Thomas Was Alone tells the story of the world's first sentient artificial intelligences, and presents them as colored rectangles. Thomas is the first — a small red shape that learns to jump. Over 120 levels, more characters join: tall, short, floaty, anti-gravity, jump-pad — each with a unique skillset that combines with the others to clear obstacles none of them could handle alone.

The puzzle layer is platforming with a co-operative twist played by one person. You switch between rectangles, position them, use one's body as a step for another, and figure out how to get every shape to its exit. The mechanics scale slowly, never punishing, but the level design quietly demands smarter combinations the deeper you go.

The presentation is where the game stops being just a platformer. Danny Wallace's BAFTA-winning narration gives each rectangle a voice, a personality and a small interior life — Thomas is anxious, Chris is grumpy, Claire thinks she might be a superhero — and the whole thing reads like an audiobook playing over the level design. David Housden's procedural score adjusts to the action without ever stepping on the voice work.

Mike Bithell shipped Thomas Was Alone as a solo developer originally, and the game became one of the defining indie successes of its era. The minimalism isn't a style choice — it's the whole point. The less the game shows, the more your imagination fills in, until you're genuinely worried about a small yellow rectangle's emotional arc.