Humble Bundle offers Steam downloads of the Humble Intergalactic Bundle for Windows for whatever you want to pay. If you opt to pay the bare minimum of $1, you'll get Space Hulk Ascension, Sins of a Solar Empire: Trinity, and Galactic Civilizations II: Ultimate Edition. That's $69 under the lowest price we could find for these games purchased separately elsewhere.

If you pay more than the average, currently $6.94 $7.41, you'll also get Planetary Annihilation: Titans, and Rebel Galaxy. Finally, pay $15 or more to receive Galactic Civilizations III and Offworld Trading Company. Your contribution can be donated to charity (Challenger Center for Space Science Education and DirectRelief), the developers, or both. Deal ends April 25.

Note that select games are also available for Mac and Linux.