Half-Life: Restored --- Black Mesa Inbound --- Free game

https://store.steampowered.com/app/1283930/HalfLife_Restored/ by Vect0R Update v1.3 Retro Game Previously known as Restore-Life, Half-Life: Restored is a fan made modification for Half-Life. This modification will stretch your Half-Life experience with unused, cut and retail version content from original game.