Half-Life: Uplink

Half-Life: Uplink is a standalone demo for Valve's 1998 shooter, built from content originally cut during development. You play through a scenario that fits chronologically before the Lambda Core section, facing enemies and using weapons from the full game in areas unique to this release. The demo includes the Hazard Course tutorial, which walks you through movement, combat basics, and environmental interaction. What makes Uplink distinct is its setting—these levels don't appear in the retail version of Half-Life, giving series veterans something genuinely new to explore. It later appeared as a hidden extra on PlayStation Magazine Disc 57, unlockable via cheat code in the PS2 port. If you're curious about Half-Life's development or want a condensed taste of its mechanics without the full campaign, this offers both.