Gigapocalypse

You need to see the vigilante on screen 7 times, across separate runs. He can be found on the beginning (usually the first 30 seconds) of Wild West 1. He is riding on a white horse. I shot him a bunch of times as he rode off to the right of the screen waving at you. Once he waves and disappears, hit , select upgrade to take you back to the menu, and do another run. His appearance is RNG-dependent, so if he doesn’t show up in the first 30 seconds, quit out and start another run. Took me about 10 minutes to unlock after about 15 or so tries.