Half-Life fans are used to long waiting. Jokes about Half-Life 3 being "confirmed" have already made their way into online mythology, and fans have had to wait nearly 13 years for a new game in the series. The same amount of time passed before the full version of Lambda Wars, a standalone Alien Swarm mod set in the Half-Life universe, saw the light of day. The game is now available for free on Steam in version 1.0.
Lambda Wars is a real-time strategy in which we side with the Resistance or the Combine (there's also a third playable faction, but only in sandbox mode) across multiple online modes or single-player skirmishes and missions. As the mod has received Valve's blessing, it features faithfully reproduced units, buildings and other elements known from the Half-Life universe.
The mod originally hit Steam in 2014 as part of the now-defunct Steam Greenlight program, nearly 7 years after work on the title began. However, Lambda Wars officially remained in beta until last Saturday, which was partly due to the fact that the developers treated it as a "passion project" (read: they weren't raising funds for the game's development). Not that it spoiled the fun for players, at least judging by the positive reviews on Steam. Version 1.0 introduces a lot of fixes, but also modifies models for some units and buildings. There are also new structures and troops, including heavy infantry for both sides.