Activating this trainer:
Press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.
NumPad1: Infinite Health
NumPad2: Infinite Nitro
NumPad3: Infinite Durability/Ammo
NumPad4: Unlock All Levels & Riders
NumPad5: Change Money By 500
NumPad6: Change EXP By 500
Infinite Health: While active you will not receive any damage
Infinite Nitro: While active you have unlimited. Use or gain nitro to refresh your nitro bar ingame.
Unlock All Levels / Riders: While active you have access to all levels and riders. Once applied this is permanent.
Money / EXP: During race when your health is visible, press hotkey to add more. Then open ingame menu to see your updated amount.
Unlock more trainer options including updates from here - Road Redemption Trainer