Run. Think. Shoot. Live. Source. BMS Classic is a game-wide modification of Black Mesa that aims to revert some of the changes made in the 1.0 and 1.5 updates, as well as fix various bugs and oversights, improve performance, and reimplement missing setpieces and sequences from the original Half-Life - removing self-locking doors, allowing the player to backtrack and explore at their own leisure, restoring puzzles, rebalancing combat and supplies, and more.
Combat throughout WGH has been altered, to hopefully even out the difficulty curve and better teach the player how to face off with Black Mesa's HECU. The player has access to the pistol, revolver, shotgun, and MP5 at this point, giving them the ability to engage with marines at long, medium, and short range as needed.