Today only Telltale Games are having 50% off almost everything in their online store, with free international shipping for orders over $50 USD.
This includes both games and mechandise.
Some examples of the stuff you can get:
All the Sam and Max Tellgame games (Seasons 1,2 and 3) for around 20 USD.
Complete collection of Tales of Monkey Island for half price.
Wallace and Gromit adventure game half price
Homestar Runner adventure game for half price
Associated TShirts for $10, cards, drinking glasses and other merch for half off
Artbooks and signed posters at drastically reduced prices
Back to the Future "OUTATIME" License plates!
The only exception to the half price offer is the preorder for the new Back to the Future game ($25 with free copy of Puzzle Agent), and Poker Night at the Inventory ($5). Even at full price these are pretty great prices.
Most of the games supply both the Mac AND the PC versions in the cost price, and are digital download options. However with some you can also order a DVD copy later for free.
Note that the discounts don't show up until you check your shopping cart. They're still listed at full price on the store site.
This is part of Telltale's Advent Calendar, which has been posted before, but I thought i'd highlight this specific deal because it is such a bargain. Not sure how long it will last, but I presume it's a today only (in the US) thing.
see the advent calendar for more details.
http://www.telltalegames.com/30daysoftelltale