Outcast 1.1 is currently available for free from GOG.com. There is no indication if this is a permanent price reduction or a temporary promotion, so it's best to act swiftly if you want in. Outcast 1.1 is a version of the action/adventure that was recompiled in 2014 from the original 1999 source code to run on modern computers. Word is: "The main improvements compared to the original version are: multithreaded voxel renderer for higher performances, software bilinear filtering on polygonal meshes, part of the HUD redesigned to match higher resolutions, new high-resolution sky paintings, new launcher, native support of xbox gamepad, user-friendly controller configuration, a lot of bugs fixed and improved stability." Here's more:

As part of a covert experiment, the US military deployed a probe designed to prove the existence of a parallel universe hidden from our own. Although the probe successfully entered the alternate universe and reached a planet called Adelpha, its first crucial data transmission is mysteriously cut short.

The probe's unexpected demise triggers a disastrous chain of events resulting in the creation of a black hole, one that threatens to destroy the Earth. Unless the missing probe can somehow be found and repaired, planet Earth itself is doomed.

• Vast and diverse continents to explore, inhabited by thousands of living creatures
• An excellent mix of action and adventure, well-designed combat and complete freedom of movement
• One of the best games of 1999 with a memorable and believable storyline set in the not-so-distant future