In-Game Monster/Player info system that displays information about NPCs and other players the player is looking at (info system for monsters only can be disabled for realism.) Some of the major features of the mod include: This creates an extremely diverse game play environment, as virtually all other games have a fixed theme and time period. Map scenarios can be set in Black Mesa, cartoon worlds, World War II, fantasy maps, modern urban warfare or any other kind of theme and time period the mapper chooses. The aim of most levels is to reach the end or to achieve an objective - obtaining a high score is not the focus. Many missions span several maps, and some are collected together in a series. Sven Coop's levels are set as missions and are generally separate from each other. The single player campaign of Half-Life is supported by Sven Co-op, but in a slightly altered form to create a better challenge for co-operative play.

Since Sven Co-op is heavily based on the original Half-Life, it is essential that the player is at least familiar with Half-Life and its controls, and it is recommended that they have completed Half-Life's Hazard Course tutorial level. The current version of Sven Coop being worked on is 4.5. It has since grown to become a full blown mod, with a full team, and one of the most played games on Steam as of September 18, 2006, excluding the official games by Valve. Sven Co-op was released on Janubefore Valve's Team Fortress Classic - and is therefore the oldest Half-Life mod in existence that is still in development. The game was originally created and released by Daniel 'Sven Viking' Fearon as a small mod with two single player maps and the game configured to allow NPCs in the game (by changing a CVAR to allow them to exist in the multiplayer game mode). Sven Coop (usually abbreviated as SC) is a cooperative game multiplayer modification for the first-person shooter computer game Half-Life, where players must work together against AI controlled enemies (NPCs), solve puzzles and complete other objectives (usually specified in a MOTD) as a team.

Sven coop opposing force maps