Stronghold: Crusader is the successor to Firefly Studios's 2001 real-time strategy video game Stronghold. Crusader has much in common with the original Stronghold, but differs from its predecessor in the fact that the game is no longer set in England, instead being set in the Middle East during the Crusades. Another prominent addition not found in its predecessor is a skirmish mode in single-player, allowing customized battles with AI opponents instead of the linear campaign.