Just Cause 3
Yes the mods you unlock with the cheat stay, but you just don't see the green gear showing active as if you had done it through a challenge.
You simply enable the cheat. Activate whichever mods you want, you may unlock them all, but I have some disabled. When you go back into mods, shows no green gears, but mouse over and will show ACTIVE. Play as long as you wish and exit.
TO RENABLE the mods after coming back into game, you have to have the trainer on and just press "zero". It will enable whatever you had before. You can also activate and deactivate to your hearts content. You DO NOT have to select every single mod, every single time.
This is tested and working over 15hrs of game play even after PC reboots.
Hope that helps.