Rise of the SixString was a totally awful game, but anyway there is no reason to not hang the guitar that comes in the game/kit in your wall :) (also you can use the same guitar with Rocksmith now)

1) Print
2) Lower part use 3 screws
3) Higher part requires some assembly, the wall-base can hold the 3 guitar picks from the kit and requires 1 screw, the other part requires a screw-nut (and probably lockthread or 2 nuts)
4) Open the top holder, match the lowe strap holder of guitar to the lower dock and close the top holder