Below was a string of characters that looked less like a serial number and more like a riddle. Elias typed it in, his heart hammering against his ribs. The screen didn't turn green. It didn't give him a "Success" message. Instead, the software launched into a simulation Elias had never seen—a massive, intricate cooling system for a city that didn't exist.

If you have purchased a key but it isn't working, ensure that:

For professional use, ask the vendor for a demo license or a paid quote. Some provide 30‑day fully functional keys on request.