Half-Life Operation Nova

Operation Nova is a single-player episode for Half-Life 1 developed by Ben Greenwood. It features a storyline that runs alongside events in the original game, with voice-acting from experienced voice actors.
A single-player episode for Half-Life 1. The episode takes place during the events featured in the original Half-Life; specifically, the episode entitled On a Rail. The player plays John Skinner, a cleaner who wears a similar HEV suit to Freeman, and