Delta Particles

Delta Particles is a single-player, story-driven, total conversion modification for Half-Life 1. Features include a new single-player campaign consisting of 4 chapters, total conversion, a lot of new content, the atmosphere of the new scientific complex "Delta Base", new weapons, a new Dark Ambient...

The plot takes place at the universe of HL. You take the role of Nick Farrell, a technical engineer in Delta Base - the complex that competes with Black Mesa in various research fields including exploration of the borderworld Xen and weapon development. Due to accidental entanglement of two differen...