Activating this trainer:

If not state otherwise below, press F1 at main menu.
Listen for 'Trainer Activated'.
Press desired hotkey. All hotkeys can be changed on the trainer.

Promo Options:

NumPad2: Unlimited Stamina

Trainer Options:

NumPad1: Unlimited Health
NumPad2: Unlimited Stamina
NumPad3: Unlimited Oxygen
NumPad4: Stealth Mode
NumPad5: Unlimited Ammo
NumPad6: No Reload
NumPad7: No Recoil
NumPad8: Perfect Aim
NumPad9: Easy Craft
Multiply: Easy Station Upgrade and Trade Loot
Add: Teleport To Waypoint
Separator: Mega Vehicle Health
Subtract: Unlimited Vehicle Machine Guns
Decimal: Give Perks on Components Pickup
Divide: Freeze Mission Timer

Notes:

Unlimited Health:
Toggle on to try and keep health at 100%.

Unlimited Stamina:
Toggle on to try and keep stamina at 100%.

Unlimited Oxygen:
Toggle on to try and keep oxygen at 100%.

Stealth Mode:
Toggle on BEFORE you are spotted and likely most enemies cannot see you.

Unlimited Ammo:
Toggle on and when you reload, the ammo count does not drop.

No Reload:
Toggle on and most weapons the ammo remains full in the current clip.

No Recoil:
Toggle on and many weapons the gun will not kick when fired.

Perfect Aim:
Toggle on and most weapons the aiming reticle is the maximum aiming precision.

Easy Craft:
Toggle this on then enter the Workstation to create weapons.  You can craft weapons that are unlocked, even if you do not have the materials.

Easy Station Upgrade and Trade Loot:
Toggle this on and you can likely upgrade stations that need ethanol, also when you enter the Trade Loot screens, or many  other inventory screens you can likely upgrade or make the transaction.  TOGGLE BACK OFF when done with SPECIFICALLY USING THIS FOR CRAFT TYPE THINGS, as this is a powerful function in the game.  Leave off unless upgrading.

Teleport To Waypoint:
This teleport process, you might teleport slightly higher than you are currently, so make sure Unlimited Health Option is on!  Right click an area to teleport to on the MAP, making sure to NOT select an icon, just a blank part of the map.  Click this option, then leave the MAP and you are teleported quickly to the location!

Mega Vehicle Health:
Toggle on and the vehicle you enter will have massive health.

Unlimited Vehicle Machine Guns:
Toggle on and many vehicles that have mounted machine guns will now no longer overheat.

Give Perks on Components Pickup:
While this option is on, when you pick up most items for crafting (like common items such as components, tape, or gears and many other items), you will receive the number of Perk points that is dislayed in the trainer.  You can change the value if you like.  The value is set to 25 by default.  So if you toggle this on, then pick up some Gears, you will receive the gears and then 25 perk points as well.  You can quickly get all perks unlocked this way.

Freeze Mission Timer:
In some missions there is a timer that counts down, toggle this on to see if it will freeze that timer.