Humble Bundle offers downloads of the Humble Rhythm Sale 3-Game Bundle for Windows, Mac, or Linux for whatever you want to pay. If you opt to pay the bare minimum of $1, you'll get Symphony (pictured), Sequence, and Bit.Trip Runner. That's $24 under the lowest price we could find for downloads of these games elsewhere. If you pay $6, you'll also get Audiosurf, Beat Hazard Ultra, and Retro/Grade, a total price low by $49. Your contribution can be donated to charity (Child's Play or EFF), developers, Humble tip, or all. Deal ends March 27 at 2 pm ET.

Note: These games require a Steam account for activation.