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 Unit & Tower Health
NumPad2: Infinite Core Health
NumPad3: Unlimited Resources
NumPad4: One Hit Kills
NumPad5: Unlimited Technology Points
NumPad6: Unlimited Upgrade Points
NumPad7: Unlock All Missions
One Hit Kills: For this option to work you must have enabled health bars for enemies.
Unlimited Technology / Upgrade Points: While active spend a technology / upgrade point or switch tabs and you will have unlimited to spend.
Unlock All Missions: While active switch to mission selection and all maps are unlocked.
Unlock more trainer options including updates from here - X-Morph: Defense Trainer