
F.E.A.R. Online was a free multiplayer game. Similar to F.E.A.R. Combat, players needed to register on the official site to receive an activation code and play. However, due to high demand for beta keys and some keys failing to work, the game was later opened up so anyone could download and play. Unlike F.E.A.R. Combat, this title included a 4-player co-op story mode and a single-player option. Player versus player modes featured Deathmatch and Team Deathmatch, along with a new Horror mode and Soul King. The game introduced enemies such as swarms of Abominations, ATC Forces, Replica Forces, and Remnants, in addition to brand-new foes.