The Humble Weekly Sale is feeling lethal and unforgiving, offering six roguelikes for the tempting price of "basically nothing." Yes, these products will kill you, over and over and over again – but they're on sale. You can't beat that.
Three of the games are available for any price you want: Paranautical Activity (Early Access game), Dungeons of Dredmor Complete and Hack, Slash Loot. The remaining three games are thrown in if you pay $6 or more: The Binding of Isaac plus Wrath of the Lamb DLC, Teleglitch: Die More Edition Guns and Tunes, and Sword of the Stars: The Pit Gold Edition.
This bundle seems to be priced according to "complexity of name." Don't worry though – they will all kill you. At a discount.