Developer: Firaxis Games
Publisher: 2K Games
Release Date: October 9, 2012
Save Games Location for Windows 7[]
shell:personal\My Games\XCOM - Enemy Unknown\XComGame Game
Save Games Location for Linux Mint 17[]
/home/[user]/.local/share/feral-interactive/XCOM/savedata/
Note that if you first played on Windows and then started playing on Linux, you will need to rename the "SaveData" folder to all lower-case letters like "savedata" so that the Linux version reads the Steam Cloud saves and doesn't create a new, empty folder.
Save Games Location for OSX[]
~/Library/Application\ Support/Feral\ Interactive/XCOM\ Enemy\ Unknown/SaveData/
Save Game Location for Android[]
\sdcard\XCOM - Enemy Unknown\XComGame\SaveData