A game called Alien Breed Trilogy, from the Alien movie franchise, is free to own forever from the GOG store.
As long as you claim your copy before 14:00 UTC on the 17th February.
Experience the ultimate in science-fiction action with the Alien Breed™ Trilogy : three arcade-shooter titles in one fantastic collection, together for the first time. The Alien Breed™ Trilogy resurrects a much revered franchise with an epic narrative, swarms of intelligent alien enemies, high-impact weaponry and rich environments; all implemented with superb technology in a state-of-the-art gaming experience, developed using Epic Games’ Unreal® Engine 3.
Click the green button > Scroll 10% down the next page to the game’s banner > Click the second green button.