DeduS on 27 February 2012
2007 - Portal
[runner-up: The Witcher]
2008 - Valkyria Chronicles
[runner-up: Mass Effect]
2009 - inFamous
[runner-up: Dragon Age: Origins]
2010 - God of War III
[runner-up: NieR]
2011 - Portal 2
[runner-up: inFamous 2]