Head over to Best Buy where you can grab Fallout 4 on PS4 for just $19.99! (regularly $29.99) However, if you are part of the Best Buy Gamers Club you will get an additional 20% off, making the final price just $15.99! Be sure to select free in-store pickup to avoid shipping fees. Otherwise orders of $35 or more will ship free.
If preferred you can get this for $19.99 at Amazon and Target, as well.