Kerbal Space Program Enhanced Edition

Quick note; this achievement (and all the other 'visit' achievements) only requires you to enter the sphere of influence of the target body and then land back on Kerbin. This massively reduces the delta-v that your rocket needs as you just need to do a flyby of the target and return. The achievements also stack, so you can flyby Eve and Gilly in the same mission (with a carefully planned intercept) and pop both visiting achievements when you land back on Kerbin. Ideally you should be aiming for a free return trajectory (slingshot around Eve back to a Kerbin intercept).

If you don't know how to use manoeuvre nodes or launch multistage rockets to orbit then I strongly recommend watching some youtube videos on the KSP basics (Scott Manley has an entire KSP tutorial playlist). The Xbox port of this game is quite awkward to use and makes the steep learning curve for new players even worse.