And over at GOG.com,
Giants: Citizen Kabuto
I just got that a few days ago, too, because I've been meaning to play it since it came out, so nearly 11 years now. It's fun, but whoever decided to not allow you to save during levels is a bastard. Making it all the way to the end of a long level only to get one-hit by a sniper and have to start over from the very beginning is starting to irritate me. Probably more so than it would bother me otherwise, because it's otherwise really entertaining and has a good, British sense of humor about things.
The Longest Journey for $2.50.
Yeah, that's also been on my list. I've just been waiting for a good deal on it, and it's hard to say no to this one.
The general rule of thumb for the big Steam sales like this is to check in every day for the daily deals and get any of those if they're something you're particularly interested in. For anything else,
wait until the last day to buy it. There's always a chance that it'll be featured as one of the daily specials and be marked down even further than it is already, so unless it's already 75% off or more, be patient, and you can save money. Stuff that's only 25-33% off now may show up as 50-90% off for 24 hours later in the week.
As far as the indie stuff in today's deals that people might not know much about (as opposed to the big-name games everyone's already heard of), BIT.TRIP RUNNER is pretty fun if you like that sort of thing. It looks like a platform game, but it plays more like a rhythm game (you don't directly control your character's movement, only jumping/attacking/etc.).
I also enjoyed Recettear, even if I never did quite get around to finishing it. It's kind of a JRPG-lite, with the focus on running an item shop to rip off...I mean provide services to the townspeople and adventurers/mercenaries, managing your inventory and economy and buying and selling various goods, but you can also hire adventurers to go into dungeons to acquire items to sell in your shop, which involves basic Secret of Mana-style combat.