Half Life Guides and Walkthroughs
This page here will share minor tidbits, tricks, cheats and hints about Half Life. As with many of the other guides on my website these are designed to be very google friendly. If you're stuck, and googling to get done a certain part of the game, that's hopefully how you found this guide!
Half Life CodeBreaker Codes (NTSC-U)
Half Life Gameshark Codes (NTSC-U)