Borderlands 4 easter eggs and secrets

Borderlands 4 features numerous Easter eggs and secrets, including references to past games, pop culture, and developer history. Players can discover hidden nods like a Borderlands 1 HUD element, a "Quad-A" hot dog joke, and a Tannis-on-a-Fish collectible. Other secrets include Marcus Bobbleheads, Shrek and Donkey-like bosses, and a Team Rocket parody. The game also includes fake computer code, a location referencing Gearbox's former owner, Moxxi's tip jar rewards, and nods to Claptrap's potential superhero persona and Master Chief.