Overview
CSS SCI FI is a single-player mod for Half-Life 2. Using the latest version of SMOD, which is included, the mod puts the player through 27 intense combat missions set in Counter-Strike: Source maps. Each map contains a unique scripted scenario which is enhanced by random scripting so that the game is never the same twice. Players will fight everything from Striders to slave Vortigaunts, plus a range of Combine enemies armed with many new weapons.

Features
- Includes the SMOD Configuration Utility, which provides clear descriptions of game options, including difficulty, screen effects, health regeneration, weapon inventory and a choice of allies with no hand editing of files. Read more about configuration>
- 27 hand scripted maps. Over 8 hours of single player combat, and that's just to play each mission once. Read more about the maps>
- Includes SMOD 39D2. No need for additional downloads. Go to the download page>
- Repeatedly replayable. CSS SCI FI is always winnable but never the same twice.
Gameplay
Within each map the player spawns with a randomly selected and armed team of fellow citizens, who are optionally assisted by Alyx, Barney and a further randomly selected ally. These forces are pitted against a fixed number of Combine, whose type and armament is randomly determined within a range appropriate to the theme of the map. Between the two forces is a random assortment of zombies and autonomous Combine weapons. The goal of the player is to eliminate all of the Combine forces, or to rescue at least one hostage alive, depending on the type of map. Players may be given additional tasks, such as to find a particular weapon, eliminate a specific NPC, or protect an NPC from death.
In addition to allies and enemies, maps contain a randomly determined number of resources held in crates, which the player will need to survive and win the game. Randomly generated props appropriate to the theme of the map are also created in order to provide additional interest and challenge.
Players will face deadly challenges including helicopters, gunships, apcs and dropships, whose behaviour is tightly controlled through scripting in order to produce a challenging yet realistic and repeatable gameplay experience.
