Greetings! Today we will learn how to cause extinction on Garry's Mod!

Step 1. Get yourself a cube or anything

Step 2. Get a propeller blade

Step 3. Get the Motor tool

Step 4. Set the torque all the way to max

Step 5. Motor the propeller blade onto whatever object you selected

Step 6. Make sure your keys for backwards/forwards on the motor are what you want

Step 7. Duplicate the contraption

Step 8. Put the duplicated contraption next to the original contraption

Step 9. Repeat step 7 and step 8 until you have your desired amount of duplicates

Step 10. Rope all the duplicates together (Roping the blades are better because it makes the machine more deadlier.)

Step 11. Get a group of NPCs

Step 12. Stand back at-least 50 feet away from your contraption

Step 13. Build a base or get something to protect yourself in-case something goes terribly wrong

Step 14. Make sure your health and suit is on the highest it can go

Step 15. If the area is clear of anything you don't want to be wrecked, then proceed to step 17, otherwise continue to step 16

Step 16. Clean the area until there is nothing but your contraption, the group of NPCs and your base/defenses

Step 17. Press any of the forwards/backwards keys you set

Step 18. Spawn in a bunch of explosive barrels

Step 19. Watch what happens

Step 20. CONGRATS YOU HAVE CAUSED MASS EXTINCTION!

Note: Please be aware that this guide was only made for fun.