This week's Halloween-inspired Humble Indie Bundle (hence, the In-DIE name) features seven titles so far, plus one title available absolutely for free. If you complete the captcha on the official page, you'll receive a free Steam copy for Teleglitch: Die More Edition.
As always, paying only one dollar will get you Steam keys for net you several games, this time OlliOlli, Insanely Twisted Shadow Planet, and Tower of Guns. Paying more than the average of $5.93 (at the time of this writing) will get you Jazzpunk, Amnesia: A Machine for Pigs, and four (count them, four!) copies of Risk of Rain. You may want to wait, though, for more games to unlock in this teir.
The premium tiers hide Shadowrun Returns, which unlocks if you pay $12 or more. But if you pay $65 or more, you'll obatin the Humble Indie Bundle 13 Box O' Treats, which includes Fangamer merchandise with a custom Humble Indie Bundle 13 artwork, hoodie, collectible cards, patches, and a cassette with music from the games in the bundle.