Sid Meier's Civilization V

Save Location
On Windows: shell:personal\My Games\Sid Meier's Civilization 5\Saves

On Mac OS X: ~/Documents/Aspyr/Sid Meier's Civilization 5/Saves or ~/Library/Application Support/Sid Meier's Civilization 5/Saves

On Linux: ~/.local/share/Aspyr/Sid Meier's Civilization 5/Saves

For more information on Civilization V, see the Civilization Games Wiki.