Do you like free things? How about having those free things produce moon-shattering explosions? If the answer is yes you'll be glad to hear that the large-scale RTS Planetary Annihilation fits both of those requirements.

However, while a Steam key for Planetary Annihilation is being offered for free that doesn't mean its going to be a simple process, you're going to have to jump through some minor hoops first. Here's how it works:

First you will want to go to the Bundle Stars website itself and feast your eyes on the big, white promo box on the left side of the screen. That will be your quest log, with the final reward a shiny Planetary Annihilation Steam key.

All you'll need to do is sign up for the Bundle Stars Newsletter, join their Steam Group and take a peek at a couple of adds, one of which is for Planetary Annihilation's Titans expansion. Do all of that, and the key will be yours. This promotion is only good while supplies last, so don't dilly-dally too long or you might miss it.

If you can't see the white promo box at all, make sure to either disable your add-block, or attempt to do the whole process in another browser as a couple of people have reported similar issues.

Finally, while you're at the Bundle Stars website, I'd recommend you check out the Daedalic Mega Bundle as you can get the excellent Deponia point&click series and a few other goodies for a reasonable €5.