Another fantastic list - thank you for putting it together
Some other additions I think but forgive me if I have missed these already in the list:
Alien Isolation Nostromo Steelbook Edition (EU) (XB360 / PC)
Assassin's Creed IV Black Flag Black Chest Edition Steelbook (EU) (PS3 / XB360 / PC / WiiU)
(The colour is different to the NA one)
Company of Heroes 2 First Edition Steelbook (EU) (PC) (EDIT: Same as Red Star)
Doom Day One Steelbook Edition (EU) (PC) (EDIT: G2)
Doom 3 Collectors Steelbook Edition (NA) (XB360)
Dragon Age Origins Jumbo Steelbook Edition (EU) (PS3 / XB360)
Dying Light Steelbook (EU) (PC) (EDIT: G2)
Final Fantasy XIII Lightning Returns Futureshop Preorder Steelbook (NA)
Gears of War 2 Promotional Steelbook (NA)
Halo 2 Steelbook Edition (EU) (XB360) (EDIT: Metalpak)
Halo 4 Preorder Steelbook Game Exclusive (EU UK)
Halo 4 Preorder Steelbook (EU France)
Mass Effect Limited Steelbook Edition (EU Russia) (PC)
Pro Evolution Soccer 2009 Manchester United Preorder Steelbook Game Exclusive (EU UK)
Project Zero: Maiden of Blackwater Limited Edition Steelbook (EU) (WiiU)
Rome II Total War Collectors Edition Numbered Steelbook (EU) (PC)
Resident Evil 6 Collectors Edition / Preorder Steelbook (EU) (XB360)
Sim City Preorder Steelbook Edition (EU Poland)
Sid Meier's Civilization: Beyond Earth Steelbook Edition (EU) (PC)
Super Mario Bros 2 Preorder Jumbo Futureshop Steelbook (NA) (3DS)
Super Mario Bros U Preorder Futureshop Steelbook (NA) (WiiU)
Tom Clancy's Splinter Cell: Blacklist - The 5th Freedom Silver Edition (EU) (PC / XB360)
Tom Clancy's: The Divison - Sleeper Agent Collector's Edition Preorder Steelbook (EU) (PS4 / XBOne / PC) (EDIT: G2)
W2K15 Preorder Steelbook (Israel?)
Wildstar Deluxe Steelbook Edition (EU) (PC)
I hope I have my facts right!
