Somehow we've neglected the first four iterations of this awesome thing, but the fifth Humble Indie Bundle has arrived, and it's well worth a look. Pay whatever you want for 4 to 5 awesome indie games playable on Windows, Mac, and Linux, and split your payment however you like between Child's Play, the Electronic Frontier Foundation, the game developers, and the Humble Bundle site itself.

• These could be yours.

The games themselves are terrific:

• Amnesia: The Dark Descent is a sweet first-person horror/survival game from 2010 that used a much-beloved sanity system in addition to boring old health. Somehow we never got around to this one, but we're eager to get on it.
  
• LIMBO is a lovely, dark little puzzle/platform game from 2010 that caused the famous moratorium on using the word "atmospheric" in video game reviews that has only just recently been lifted.
  
• Psychonauts may feel like an artifact from a forgotten civilization, but it's one that's much more advanced than ours. 2005 was a good year, and this excellent, innovative platformer is a non-stop sugar rush.
  
• Superbrothers: Swords & Sorcery EP is a nutty adventure game from last year with great sound and visual design and a story worth following all the way through to the end.
  
• Bastion, last year's breakout indie action RPG, is only available if you pay more than the average Bundle buyer, which is currently set at the stupid-cheap $7.72.

You also get soundtracks for all five games, the games are DRM-free, and for an extra buck you'll get activation codes for Steam as well as your downloads. This is a terrific deal for a terrific set of causes, so head on over and do your part.

The Stranger Testing Department is Rob Lightner and Paul Hughes.