Sweet Half-Life

Sweet Half-Life is a Half-Life mod created by Marc Ellis and his team. Co-designer Koumei Satou later went on to develop Peaces Like Us and Mistake of Pythagoras.

Plot
Taking place during the same time line as Half-Life, the player is Gordon McGinley, the Black Mesa warehouse manager. When the resonance cascade occurs, McGinley must find a way to escape Black Mesa alive. There are two paths to complete the game, along with two different bosses.

It starts as any other day for Gordon McGinley, until a sudden and violent shaking occurs that throws the entire base into chaos. Gordon dons an HEV suit, and joins fellow scientists in ridding Black Mesa of the invading Xen aliens, the Hazardous Environment Combat Unit, and a new, unknown alien species (which look like stereotypical Roswell "greys"). The game ends with McGinley stalking the ever-elusive G-Man on board a tram, similar to the one used in the original Half-Life ending.

Trivia

 * Several moments in the mod are either parodies and-or homages to the 1950's Sci-Fi movie popularity boom.
 * Due to a bug, this mod cannot be run with the high definition pack installed or the game will freeze.