The Talos Principle is now available on Steam for Windows, Linux, and OS X, with the first-person puzzler from Croteam carrying a 10% launch discount. Here's a launch trailer showing off the game, and there's also a recently released Public Test version for a firsthand sample. Here's the news:

The Talos Principle is a philosophical first-person puzzle game from Croteam, the creators of the legendary Serious Sam games, written by Tom Jubert (FTL, The Swapper) and Jonas Kyratzes (The Sea Will Claim Everything).

As if awakening from a deep sleep, you find yourself in a strange, contradictory world of ancient ruins and advanced technology. Tasked by your creator with solving a series of increasingly complex puzzles, you must decide whether to have faith or to ask the difficult questions: Who are you? What is your purpose? And what are you going to do about it?