Humble Indie Bundle #4 is upon us, and with it is the usual offer of “Pay What You Want” and choosing how the money is split (on this occasion, the charities are the American Red Cross and Child’s Play). The games on offer this time are Jamestown, BIT.TRIP RUNNER, Super Meat Boy, Shank, and Nightsky.

For those who pay more than the current average ($4.75 at time of writing), they also get two games as a bonus, namely Gratuitous Space Battles and Cave Story+. Steam keys are available for all the games (including the bonus ones), and the games should be available on Windows, Mac, and Linux.

At time of writing, the fourth Humble Indie Bundle is available for a little over fourteen days, and as always you can get it from HumbleBundle.com.

Update: Now included in the bundle are the soundtracks to all the games; FLAC and MP3 options for NightSky and Super Meat Boy, and MP3 for the rest.