Half-Life: Blue Shift

This is a sub-story of the game Half Life where the hero is Barney Calhoun and your mission is to escape from Black Mesa and survive. The game will not take you long to finish as it is very short, perhaps not more than two hours, and the gameplay is the same as Half Life 1 with only changes in the NPC forms. The story is simple and the weapons are okay, but I prefer Half Life 1 and the opposing forces.