From October 23 to November 6, 2025, players delved into this free limited-time event on the planet Kairos. It amped up the sci-fi horror vibes by altering boss fights—think relentless blood rain that forces you to adapt your strategies mid-battle. This isn't just cosmetic; it ties into the game's lore of ancient alien terrors, giving you new ways to role-play as a Vault Hunter uncovering forbidden secrets.
New Gear to Forge Your Legend
The real draw? Two brand-new Legendary items: the Murmur assault rifle and Skully grenade. The Murmur packs a punch with whispering audio cues that hint at enemy weak points, perfect for precision builds in the game's vast skill trees. Meanwhile, Skully explodes into homing skulls that seek out foes, adding chaos to crowd-control scenarios and enhancing co-op runs with up to four players.
What Rewards Are Still Available from Horrors of Kairos?
Even though the event ended on November 6, you can still snag exclusive cosmetics via a SHiFT code: 3S6BB-ZXT93-KRT3W-BT3T3-JW6TZ. Redeem it for the 'Gourd Your Loins' head and 'Hex Appeal' weapon skin—valid until December 31, 2030. These tie into the horror theme, letting you customize your character with pumpkin-inspired flair that nods to Kairos' dark mysteries.
How Does This Event Impact Borderlands 4's Meta?
This mini-event expands world-building by weaving in seasonal lore that could foreshadow future DLC. For RPG fans, it means more narrative depth in your adventures, while shooters get loot that diversifies builds beyond the procedural weapons grind. If you missed it, keep an eye on Gearbox for similar events—they're great for cooperative multiplayer and keeping the universe alive post-launch.
Borderlands 4 continues to evolve its first-person RPG shooter formula, blending action with science fiction exploration. Dive back in to see how these changes shape your path.