Hello r/Blender, above I've shared a demo built using ONLY Blender and the BGE replacement plugin Armory3D.

Runs Best on Google Chrome

Click the screen and use WASD keys to move

Use Spacebar to jump/fly

Click and drag left mouse button to look arround

Push physics objects by running into them

Link to the terrain node shader that was used here. Please share any node feedback you have.