The best replacement for forza is gran turismo.

The best alternatives to forza are rated as following:
★★★★★  gran turismo
★★★  need for speed
★★  gt
★★  pgr
★  gt5
★  need for speed rivals
★  nfs
★  gt4
★  grid
★  ryse
★  driveclub
★  need for speed xbox one
★  gran turismo 4
★  project gotham
★  dead rising
★  gran turismo 5
  iracing
  need for speed shift
  grand turismo
  need for speed for xbox one
  forza
  drive club
  majesty
  turismo
  burgman
  need for speed on xbox one
  dirt
  gran

Your alternative for forza is not listed? Suggest!
Speaking about forza, one probably shouldn't forget about g27.

Other search terms related to forza and their ratings are:
★★★★★ g27
You have in mind a companion for forza and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of forza in all years. Click on graph for more.
forza
gran turismo
need for speed