Galactic Civilizations is free for everyone with this sci fi strategy Humble Bundle

The latest Humble Bundle has a totally free tier if you're extra skint this week.

Humble Bundle has a new offering, and you can not only pay what you want but also pay nothing at all, if you prefer. Obviously that option is always open to you, but this time it comes with a game. Hoorah!

The base tier is completely free; just hit the link above and scroll down to claim a free copy of Galactic Civilizations: Ultimate Edition, Stardock's 2003 4X TBS.

Pay what you want over $1 and you'll also receive Space Hulk Ascension, Sins of a Solar Empire: Trinity and Galactic Civilizations 2: Ultimate Edition.

If you beat the average ($6.82 at time of writing) you'll get Planetary Annihilation: Titans and Rebel Galaxy as well.

Finally, the premium tier is $15 and comes with Galactic Civilizations 3 and Offworld Trading Company.

That's a lot of sci fi bang for your buck. Everything's on Steam this time - sorry, no DRM-free options - and there are a scattering of Linux and Mac ports in there if you like.

As usual, you'll decide how your payment is split between organisers, developers and charity. This bundle's beneficiaries are Challenger Center for Space Science Education and Direct Relief, and you can name a third beneficiary of your choice as well. We'll also get a kickback, but that's at your discretion like everything else.

Well? Go take advantage.