Have you ever thought of going to the moon ?

[Touti]

This may be your only chance.

http://www.moonbasealphagame.com/

[Jimmy]

Does it count when other people told me I'm there

[snowcat]

That looks really cool!

[lyonsden5]

Looks like one of those things where you sare being monitored by some secret government agency. If you solve puzzle X you will be recruted. 

Oh wait... That was Stargate Universe. 

[Achim]

And it's available though Steam

I wish I could take my chance, but: sadly no Mac version available (yet...?).