Games That Already Went on Daily Deals

Pretty sure more daily deals go by than new games added to Steam, so, yes, they'll always come back around again, more often for the more popular games. However you could be waiting for a long time before a specific game comes back on sale.

They'll end up in one of the large sales, but I wouldn't hold my breath for a daily/mid-week/weekend deal.

Yea, I don't think I've seen the same game on DD or mid-week or etc for at least a few months. I know Killing Floor pops up often but still it's months between at least.

The summer sale is the end of June. Pretty much everything on Steam goes on at least a slight sale during their big sales. I'd be surprised if Bioshock 1+2 didn't go on sale then. :)

At least wait for Infinite pre-order; they can be pre-order bonuses.

Bioshock appears every month or two at various sites for $5. I'm sure Steam will reduce it to that if you wait enough. Here's a history of the Bioshock 2's price and here's one for Bioshock.

It depends. BioShock will be on sale again for sure. Though I guess it will be a weekend-sale when BS Infinite gets released.

Some games like Mirror's Edge, Mass Effect or Indies like Gatling Gears will most certainly no more appear in Daily Deals (summersale might be an exception).