Doombot is unlocked when you complete "Doctor in the House" in story mode. The V-Series version is unlocked when you complete "A Doom With a View" in story mode. These are levels 9 and 14 respectively. This video shows some free roam gameplay with both of these characters so you can see what abilities they have.

This channel features instructional & highly edited video game guides, walkthroughs, speedruns and other uniquely transformative videos. My own personal gameplay, extensive editing & creative input are clearly added into each video, ensuring that all videos adhere to YouTube's partner program guidelines. My walkthoughs take tremendous amounts of work & editing so that all videos are straight to the point & can be used as professional video game guides. All gameplay is my own & is recorded and edited solely by me. Permission to upload each game was provided by the game publisher.