As a reminder and a PSA, don’t buy a game unless it’s the Daily Deal or one of these Flash Deals, until the very last deal. Chances are good you’ll buy it, and it’ll be the next day’s daily deal.

Edit: @Beige I would bank on ARMAII being a daily deal in the next couple of days.
Edit 2: Better explained via Reddit –

“During the big sales, Steam discounts just about every game for the entire length of the sale (they last 14 days). Each day, Steam takes a handful of those discounted games and discounts them even further, calling them the “Daily Deal”. So a game that was 25% off during the first three days of the sale might become a daily deal on day 4 and get marked down to 75% off. On day 5, it goes back to 25% off and stays that way until the end of the sale.

Not every game becomes a daily deal. So if you’ve got your eye on, say, Civilization V at 50% off, you should wait to see if it becomes a daily deal and maybe get 75% off instead. If it never becomes a daily deal, then on the last day of the sale, you can still at least pick it up for 50% off because you won’t see at better deal at that point.”