[johncalvinyoung]

Note: not available now.

`Kerbal Space Program: Making History Expansion is still in development and will be released as a paid expansion. Pricing and availability details will be announced at a later date.`

[adventured]

It is available now.

http://steamcommunity.com/games/220200/announcements/detail/...

[TheEnder8]

Steam store link: http://store.steampowered.com/app/283740/Kerbal_Space_Progra...