(Disclosure: This site contains product affiliate links. We may receive a commission if you make a purchase after clicking on one of these links. Read our affiliate disclosure for more info.)
GameFly / GameFly UK has a Macintosh 30th Anniversary Sale going on. Most of the games in the sale are 30% off (clever), but some are discounted for more.
Also for as a special flash deal for 1/27/14 BioShock Infinite is on sale for $10 (75% off). Stacks with their current 25% off coupon, which makes the game $7.50. Requires Steam.