There's nothing like playing the most up to date games, and this is nothing like an up to date game!
KSP first released in early access way back in 2011! But with some of the mods available it can be made to look like a newly released game.
This game probably isn't for everyone, with it's rather steep learning curve and a lot of un-explained mechanics, but it has one of the most knowledgeable communities there is! So learning is easier now than ever.
Players direct a nascent space program, staffed and crewed by green humanoid aliens known as "Kerbals". The game features a realistic orbital physics engine, allowing for various real-life orbital maneuvers such as Hohmann transfer orbits and orbital rendezvous.
