Hero Siege Steam announcements
Official Steam announcement feed used for current-version and Season 10 context.
Progression Guide
Hero Siege Act 9 Guide
How to enter and progress through Act 9 in Hero Siege Season 10, with current official facts and community-reported troubleshooting checks.
- Target keyword
- hero siege act 9
- Page type
- Progression Guide
- Version focus
- Season 10 / current version
Quick Answer
Answer first
Enter Act 9 after defeating Odin at the end of Act 8. The official Season 10 Ebontharn announcement names Act 9 as the new free act and says it is accessible after Odin.
Act 9 is the end of the Normal campaign route in Season 10. Community progression guides currently report that the Act 9 route ends with Cthulhu in the Abyssal Realm and that this clear is the practical Nightmare unlock milestone.
If the next NPC or quest marker does not appear, first check the Act 8 Odin completion state, your quest log, minimap markers, and whether you are on a patched build after the 7.0.2 quest-marker fixes.
Entry
How to enter Act 9
- Finish the Act 8 route through Odin on Normal.
- After Odin is defeated, look for the next campaign transition rather than replaying older difficulty routes.
- Follow the quest log and minimap markers for the new Act 9 NPC chain. Patch 7.0.2 specifically improved Act 9 NPC indicators.
- If a community guide names a pirate tavern NPC or ship route, treat that as useful direction but still confirm the NPC and objective text in your own current build.
Progression Role
Where Act 9 sits in Season 10
Season 10 changes the campaign expectation: Normal is the full Acts 1-9 story run, then later difficulties become more about retained waypoints, farming, Ether, Incarnation, and endgame scaling.
That means Act 9 is not just another side zone. It is the current bridge between finishing the Normal campaign and opening the post-Normal difficulty loop.
Confirmed Content
What Act 9 adds
- A new free act called Ebontharn.
- New Act 9 quest flow, with official hotfix notes confirming quest-marker and NPC-indicator work after launch.
- Three new Uber bosses in the Season 10 launch notes: Phantom Leviathan, Captain Grimtide, and Blood Maiden.
- New chase-zone relevance, with patch notes moving several item farms into Act 9 zones.
- Community-reported final Normal milestone: Cthulhu in the Abyssal Realm.
Stuck Checks
If the next quest or NPC does not appear
- Make sure Odin is defeated and any post-Odin interaction or quest turn-in has actually completed.
- Open the quest log and check the minimap for NPC markers, especially on builds after the 7.0.2 Act 9 marker fix.
- Return to the last Act 8 and Act 9 hub or waypoint you used instead of following an old map route from a pre-Season 10 guide.
- If you are using a community route, compare the NPC name, area name, and objective text against your current build before assuming the route is wrong.
- If you changed difficulty, party state, or instance after killing Odin, re-check the quest tracker in Normal.
Decision Guide
What to do next
Odin is not cleared
Finish the Act 8 chain first. Official notes place Act 9 access after defeating Odin.
Odin is cleared but Act 9 is missing
Check quest log, minimap NPC indicators, and current patch status before treating it as a bug.
Cthulhu is cleared but Nightmare is missing
Use the Nightmare page to check the current difficulty unlock flow.
Related Guides
Go next
Sources & References
What this page relies on
Season 10 Official Patch Notes spreadsheet
Official Season 10 patch-note sheet linked from the Steam launch and Ebontharn announcements.
HS Tracker Season 10 patch-note mirror
Community mirror of the Season 10 patch-note spreadsheet, used for searchable change categories and current item/system changes.
T-Pose Gaming - Season 10 difficulty unlock walkthrough
Current community walkthrough used to cross-check practical Act 8, Act 9, Nightmare, and Hell unlock flow.
Vortex Gaming - Season 10 progression summary
Community progression summary used to cross-check Act 8, Act 9, Cthulhu, Nightmare, Hell, and Ether Point reports.
Needs Manual Review
Before publishing exact details
- Exact Act 9 NPC names, area-by-area objective order, and quest hand-in sequence.
- Whether the community-reported Cthulhu unlock trigger has any hidden quest, party, or patch-state edge cases.