Ok, I'll try to clarify any question you may have. Beware long post ahead!
During the Summer, Autumn and Winter sales there are four types of sale:
- Most games on Steam get a base discount that will last for the entirety of the sale. Most games will get base discounts that can go from -10% to -50%. A minority of games will go up to -66% or -75%. If a game has a base discount of -75%, don't expect it to get any cheaper.
- The Daily Deals last for 48 hours, with new sets of dailies every 24 hours. Games that have a base discount will get even cheaper during dailies. For example, a game that has a -50% discount can be further discounted to -75% during the dailies.
- Flash Sales last for 8 hours. A set of games (usually 4) are selected for Flash sales and have their base discounts further discounted, like with the Daily deals. The games on Flash sales change every 8 hours.
- The Community choices last for 8 hours. Poeple are given 3 games to choose from. The winner of the vote gets to be on an 8 hours discount.
Games that are on Dailies, Flash or Community sales won't get any cheaper. Keep in mind though that if you miss a game on sale (for example on a Daily), there is a good chance that the game will appear discounted later on another sale (like a Flash sale).
