Steam account holders will have double delight with Steam’s Midweek Madness offers available for PC today. The X Superbox series has a 75% discount costing you just £9.99. This series consists of six games to entertain you and would normally cost £39.99. Or if you’re looking for some hack ‘n slash zombie action, then Left 4 Dead 2 will be right up your alley. Steam are offering it for just £3.74 and includes 5 new zombie filled campaigns to keep you on your feet.