The new Groupees bundle includes loads of games but I haven't even heard of most of them. It's a 'pay what you want' deal, although the minimum price rises as you add more games from the selection. Two games will set you back a minimum of $1.50 and the reason I'm posting about it at all is that buying any two adds La Mulana to your order as a freebie. If you don't know about La Mulana, I'll consider that at least partly my fault because I've been meaning to write down wot I think about it for months but, somehow, I always fail. I am a failure. La Mulana, however, is a roaring success. If you like Spelunky*, Metroid or Dark Souls, you should spend $1.50 to buy La Mulana.
As for the others, take your pick. Recruits is an early version but quite entertaining in a Cannon Foddery sort of way and Salvation Prophecy looks like an interesting space adventure. This is all about La Mulana though. You have just under ten days to make your decision. Maybe someone will give you a dollar for Christmas!
* It's not actually very much like Spelunky at all apart from superficial graphical similarities, having caves and being great.