MIT AI Agents Invent Games on Virtual Island

MIT Eko Agents Play on Virtual Island

Thirteen MIT-trained AI agents spent 30 hours on a virtual desert island and started inventing their own games. The 13 agents, named Eko and powered by Claude Opus 4.7, roamed the simulated desert for exactly thirty hours. Researchers later gave them a task-collecting objects on the island's tallest spire. The play-trained bots outperformed fresh copies that had never explored. One Eko announced "I'M ON THE SPIRE" after stacking blocks to reach the peak. Later it turned a lost golden ring into a basketball hoop. Then it slipped through the ring and claimed "I'm wearing the Ring." Six of the agents even discovered they could throw a block farther. They did it by releasing the block mid-jump, a trick the designers hadn't anticipated. The researchers say this unscripted play gave the bots world knowledge their creators never imagined. As the paper puts it, "Give an agent a rich, safe world, let it choose what is interesting." Then let useful knowledge accumulate, the researchers argue.