Aspyr Media today released free patches for both Sid Meier’s Civilization IV and its expansion pack, Civilization IV Warlords. This is an official update for Civilization IV. It will fully update any previous version of Civilization IV to version 1.61 Rev C. It is recommended for all users. Civilization 4: Warlords to version 1.0 Rev B brings users up to compatibility with version 2.08 of the PC. It is also recommended for all users.