Were you worried that your indie game backlog was dwindling and it needed a shot in the digital arm? Have no fear, intrepid player, as Humble Indie Bundle 13 has arrived and lets you rebuild that backlog by donating to charity. If that's not a win-win we don't know what is.

The core section of Bundle 13 is skateboarder OlliOlli, colorful space shooter Insanely Twisted Shadow Planet, and fast paced first-person shooter Tower of Guns. Donating more than $6.95 unlocks Amnesia: A Machine For Pigs just in time for Halloween, the adventure comedy game Jazzpunk, four copies of multiplayer game Risk of Rain, and more that we don't even know about. Paying $12 or more unlocks Shadowrun Returns, and paying $65 or more will unlock a pack of physical items, like a hoodie and tarot-style collectible cards, that will ship in January.

There's a lot of quality games here, but paying $12 to charity in order to receive Shadowrun Returns seems like a no-brainer. Of course you'd also get six other games (including multiple copies of one of them) plus whatever the "more games coming soon" entails, but Shadowrun Returns alone is worth that price of admission.

The Humble Bundle does a wonderful job of bringing games to players that normally wouldn't play them while also helping out a great charity, so if you're interested in any of these games now is a perfect time to jump.