Kerbal Space Program hits a historic low price of $10 (only took 5 years for it to touch the $10 mark!). If you've never tried the excellent rocket sim title, you'll now have an extra incentive in 5 free games to do so. Steam key, part of GMG's Summer Sale.

Missed Steam Store's 50% off sale on Kerbal Space Program? Your second chance awaits at GMG for the same Steam key. Part of GMG's "Hidden Gem" sale - though Kerbal is anything but a hidden title.

It's not often you find Kerbal Space Program under $20 these days, but it's now a flash sale headliner in GMG's 2017 Summer Sale. You'll need to act fast to pick this one up on the cheap getting a 50% instant discount + stacking 25% off coupon code. Once it's no longer a flash sale it'll go to 50% off only.

KSP is just one of those early indie success that rarely goes on a big sale now that its fully released (and out of the cheaper early access price point). Rare deal from GMG brings it down to $21. Typically $28-$30. Steam key.

Kerbal Space Program under $20 this weekend thanks to Mac Game Store sale. Limited time deal. Steam Play key (will activate and work on either Mac or PC without a problem).