borderlands 2 slot machine trick. Does anyone know if Jackpot! challenge in Concordia is broken in any way? I'm starting a new character and I cannot get this challenge even though I got. I'm sure it's just RNG being RNG, but I figured I'd ask. It was around october 18 Maybe it was very. . Advertisement. Man, the slots seemed much nicer in BL2, especially with Eridium jackpots. borderlands 2 borderlands: el logo del videojuego de la pre-secuela, reloj. And later he got about 20 moonstones with 50 tries. After about tries, it crossed my mind that it may not even been possible to win. Jackpot! is a challenge in Borderlands: The Pre-Sequel to get either three vault symbols or three Moonstones on the Lucky Shot slot machines. I know it's probably the same RNG, but ever since I've started. My friend hit moonstone jackpot in one try. Slot machines are interactive objects introduced in Borderlands 2. They can drop anything from weapons to a live grenade depending on the result.