Shack PSA: Weekend PC Deals on All Serious Sam, Garry's Mod and More

A new weekend means a new round of deals and discounts on digitally-distributed PC games, which we have perused, parsed and presented for your purchasing pleasure.

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Top treats this weekend include the weird and wonderful Source Engine sandbox Garry's Mod for $4.99, reduced to celebrate its Mac launch, as well as bargains on all things Serious Sam and a bargain $6 bundle of the X-COM series.