Devolver Digital announces the release of a playable tech demo for The Talos Principle, Croteam's upcoming "metaphysical parable," offering it for Windows, OS X, and Linux on Steam as well as versions for Android or iOS. They also announce a release date for the full game, saying it is coming on December 11th. Here's word on the tech demo:

The public test for The Talos Principle consists of four increasingly difficult complete puzzle levels where players will be able to test the range of puzzle mechanics, and run and share benchmarks if they choose. The demo is meant to serve as additional stress and compatibility testing before The Talos Principle launches later this year and is now available on Steam for a limited time prior to the game's release. The Public Test initiative for The Talos Principle harkens back to 15 years ago when Croteam released “Public Test 1” for Serious Sam, a then unknown game that went on to become a multimillion dollar franchise.

In The Talos Principle, players assume the role of a sentient artificial intelligence placed within a simulation of humanity’s greatest ruins and linked together through an arcane cathedral. Players are tasked with solving a series of increasingly complex puzzles woven into a metaphysical parable about intelligence and meaning in an inevitably doomed world.