ROBOBEAT - "Loyal til' the End" achievement run (Revolver only Frazzer run)

Definitely the most difficult achievement in this game and a fairly fun one, this achievement requires you to use only the starting level 1 Revolver & utilities and beat the entire "Frazzer's Room" section (final section of the game). After the first couple areas, the revolver becomes essentially useless and 90% of your damage comes from parrying & using the utilities. The Frazzer fight especially is rather long & essentially an endurance check.