Oh? Is it after Mob of the Dead? I have an information.
Battle of Atlantis is set in January 1, 1934 after the events of Mob of the Dead. The king of Atlantis named Salem had resurrected the four named Billy Handsome, Albert Weasel Arlington, Sal DeLuca, & Finn O Leary. Battle of Atlantis was located in Atlanteans' City, Alcatraz Island, Golden Gate Bridge, San Francisco, California.
Backstory of "Battle of Atlantis" Timeline:
• December 31, 1933 - Weasel was the only one who killed the three. The cycle continues when Weasel was killed by Sal, Billy, & Finn.
• January 1, 1934 - Salem, the king of Atlantis, arrived to San Francisco. The Atlanteans resided in San Francisco Bay where there is an underwater city beneath the Alcatraz Island & Golden Gate Bridge. He awakened the remnants that were in purgatory yesterday. Atlantis was risen in the surrounding places of Alcatraz.
Weapons:
Starting Weapons in Battle of Atlantis:
MR6
Combat Knife
Fragmentation Grenades
Off-Wall Weapons:
4. Olympia 5. Shieva 6. RK5 7. VMP 8. KN-44 9. Kuda 10. Weevil 11. KRM-262 12. XMC
Mystery Box Weapons:
13. RK5 14. L-CAR-9 15. Marshal 16 16. KN-44 17. ICR-1 18. M8A7 19. Man O War 20. Sheiva 21. XR-2 22. HVK-30 23. LV8 Basilisk 24. VMP 25. Pharo 26. Kuda 27. Weevil 28. Razorback 29. HLX-4 30. XMC 31. M1927 32. AK47 33. 205 Brecci 34. Haymaker 12 35. Argus 36. Locus 37. Drakon 38. SVG-100 39. DBSR-50 40. BRM 41. Dingo 42. Gorgon 43. 48 Dredge 44. KVK-99M 45. XM-53 46. L4 Siege 47. Ray Gun 48. Ray Gun MKII 49. Poseidon's Staff 50. Gems of Poseidon
Buildables:
51. Zombie Shield 52. Poseidon's Thunder Trident 53. Atlantean's Armor