Today only, Green Man Gaming offers its VIP members Steam downloads of
Space Engineers for Windows for $9.50. (Not a member? It's free to
join; just signing into an account makes you a VIP.) Coupon code "SUMMER2017" drops the price to
$7.60. That's the lowest price we could find by $17. This space-themed sandbox game now includes both creative and survival modes, as well as single-player and multiplayer versions (multiplayer currently in alpha).