Civ 5 is approx. $10.50 CAD (as per XE.com) right now! It will provide you with a CD key that can be activated on Steam (steamworks title). The steam version works on both Mac and PC.
http://www.gamersgate.co.uk/DD-CIV5/sid-meiers-civilization-v
Props to Shamb1es on RFD.
http://www.gamersgate.co.uk/DD-CIV5/sid-meiers-civilization-v
Props to Shamb1es on RFD.