Half-Life

Half-Life is a first-person shooter developed by Valve Software and published by Sierra On-Line. It was released for Windows PCs in November 1998 and built on a heavily modified version of the Quake engine. The game follows theoretical physicist Gordon Freeman as he fights his way out of the Black Mesa Research Facility after a disastrous experiment tears a hole between dimensions, unleashing aliens while drawing the attention of a ruthless military cleanup crew.

The game was praised for its immersive, seamless storytelling, which eschewed cutscenes in favor of scripted sequences and environmental cues. Its artificial intelligence, particularly the behaviors of the HECU soldiers, set a new standard for enemy encounters in shooters. The sound design, leveraging A3D 2.0 and EAX 3D audio, further heightened the tension and atmosphere.

Half-Life also shipped with Worldcraft 2.0, the level editor used by Valve, fostering a robust modding community that produced countless single-player campaigns and multiplayer mods, most famously spawning the original Counter-Strike. Expansions followed: Opposing Force (1999), Blue Shift (2001), and the standalone Decay (2001, for PlayStation 2). Over the years, the game has remained available through digital platforms such as Steam, where it continues to run on modern hardware.