Extremely detailed ISS simulator. Don't forget to switch to external view.

ISS Simulator is a free walking simulator of the famous International Space Station that can be explored either inside or outside of it. The controls do take some getting use to due to being very wonky and for some reason the inverted camera is on by default :/ (can be easily changed in game settings)

Highly recommend checking it out especially if your a space nerd :)

Very cool to check out. The controls are needlessly wonky although I guess they are trying to simulate zero g. it definitely is pretty demanding considering i could hear my pc fans kicking into high gear just on the bootup. But overall this is a short and very interesting way to look at the ISS on your own terms and at your own pace.

PS read the manual and be sure to check out the outside of the station before you finish with the exploration.