Available until Friday 23 May, 2014 @ 23:59 UTC:
Counter Strike: Global Offensive - play for the first time - £0.10
Counter Strike: Global Offensive - unlock The Unstoppable Force - £0.10
Counter Strike: Global Offensive - unlock War Bonds - £0.10
Counter Strike: Global Offensive - unlock Magic Bullet - £0.10
Counter Strike: Global Offensive - unlock Shot With Their Pants Down - £0.10
Counter Strike: Global Offensive - unlock Blitzkrieg - £0.25
Counter Strike: Global Offensive - unlock Head Shred Redemption - £0.25
Counter Strike: Global Offensive - unlock Variety Hour - £0.25
Counter Strike: Global Offensive - unlock Participation Award - £0.50
Counter Strike: Global Offensive - unlock Bunny Hunt - £0.50
Counter Strike: Global Offensive - unlock Expert Marksman - £0.50
Doom 3: BFG - play for the first time - £0.10
Doom 3: BFG - unlock Sticky Situation - £0.10
Doom 3: BFG - unlock Ripped! - £0.25
Doom 3: BFG - unlock Evil Recruit - £0.50
CS:GO won, as expected. Lame.