| Previous Event | Event | Following Event |
|---|---|---|
| Asphodel's End | Secrets of the Worldship | Tartarus Crusade |
Event[]
Secrets of the Worldship was the twentieth event in Tyrant Unleashed, running from April 2nd, 2015 to April 20th.
Finishing level 10 of the boss mission in each part gives the reward card. Finishing level 50 gives a second copy so that they can be fused.
| Event Box | Boss Mission | Reward Card | Fused Reward | Quad Reward | |
|---|---|---|---|---|---|
| Part 1 | Recon Box | Colossal Kraken | Cerebrum | Cerebellum | - |
| Part 2 | Ambassador Box | Valefor | Astral Strafer | Astral Strider | Astral Strutter |
| Part 3 | Expedition Box | Secrets Revealed Campaign | Incendiary Trekker | Incendiary Drifter | Incendiary Stormer |