The only TerraTech logo I could find at a high resolution was 211 x 211, so I decided to load it into photoshop and upscale it to 4k. As the logo was simple, here were my steps:
1. Resize to 512 x 512 2. Apply median filter to smooth edges 3. Resize to 4096 x 4096 3. Apply median with greater value to smooth edges 4. Convert palette to Indexed to reduce the logo down to its 4 colours (gets rid of any artifacting) 5. Remove the rest of the artifacting by hand 6. Done!