So if you had Steam you would already know there is this Summer Deal going on with these tickets you can trade in for prizes... one of these prizes is a free game worth 5$ (on sale?)[Alien Breed 2] and you're able to get 5(6) free tickets right now. Also Team Fortress2 is now Free to Play.
Each prize is 3 tickets to redeem, so that's two free prizes anyone new to steam is able to redeem. Unless you're the type of person to reject free stuff, I think many people would like a free game(or few)... so how to get the tickets?
This will be stuff like.. connect to Facebook, write on someone's wall, write a game recommendation (TF2 is free, say whatever), or playing some TF2 and joining 2Fort(or any level) and getting caught on fire (which is easy enough), and jumping in the water in the middle..., or joining a steam group.
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So that's how you do it, Free games, and many games on sale. If you plan on buying the games this is how the sale works: There are three tiers of sale going on....Third tier is every game that goes on sale from the summer sale.... they are on sale but it's the highest sale price. Most games are locked in this price.
Second tier are the games on the front store page under Daily Deals[Featured Items]... Those games are significantly dropped in price for that day, and there are about 12 of them.
First tier sale items are the ones that are currently in the prizebooth, the ones that have the day's tickets available for them. These games will have the best sale price, but might end up being indie games, unlike most of the second tier's first class games.
Also every day at 10AM is when they switch the daily deal (In California's timezone) in case you wanted to know how long you had, there is also a timer on the store page.
Happy Gaming~