Serious Sam 3: BFE is a first-person shooter video game developed by Croatia-based indie development studio Croteam and published by Devolver Digital. It is part of the Serious Sam series and the prequel to the 2001 video game, Serious Sam. The game takes place in 22nd-century Egypt, during Mental's invasion of Earth, as implied in The First Encounter. The game features a 16-player online, as well as a 4-player splitscreen co-op campaign mode. The game was first released for Microsoft Windows on 22 November 2011. The OS X support for the game followed shortly after and was released on 23 April 2012. The Linux version of the game started being worked on after a high number of requests, where the first Linux-related update was the porting of the game's dedicated server. The game itself, however, was released one day after Valve opened the beta branch for "Steam for Linux", namely on 20 December 2012.

Croteam is a Croatian video game developer based in Zagreb. The company was established by Davor Hunski, Damir Perović, Roman Ribarić and Dean Sekulić, four former classmates, in late August 1992. Croteam is best known for Serious Sam, a series of first-person shooters introduced with Serious Sam: The First Encounter in 2001. The company also developed the 2014 puzzle game The Talos Principle and its 2023 sequel The Talos Principle 2. Croteam employed approximately 40 people in 2020 and was acquired by its long-time publishing partner Devolver Digital in October that year.