Jedi Under Siege: Imperial Ossus: navigation-first Imperial campaign for Sith Warrior, Sith Inquisitor, Imperial Agent and Bounty Hunter, including named entrances, major objectives and mission handoffs.
2 main story entries17 numbered stepsImperial route7.9-era story order
LOST OR STUCK? · MAP AND FLOOR CHECK
Before chasing the quest marker, check the route
Choose the active story mission.Press L to open the mission log and track the named Sith Warrior objective. A purple mission symbol marks important story content, but not necessarily YOUR class mission. Follow the exact title and task shown in this walkthrough.
Open the full map.Default M opens the main map. Alt + M toggles the overlay map and minimap. If your shortcuts differ, check your assigned keybinds. Start with the WORLD region, then switch to the current AREA or interior floor map.
A marker behind a wall is not a doorway.On the world map find the correct district or zone; on the local map look for the named cave, station, building entrance, lift, security door or staircase. When the target is on another floor, find a connecting passage before heading toward its map symbol.
Know which travel option is available.Quick Travel opens a world map with available travel-point filters. Choose an unlocked destination on your current planet and pay attention to any restrictions or costs shown in-game. For a new planet, use your Fury's Galaxy Map and the orbital station surface shuttle instead.
If the marker does not advance, check the VERB.Talk, use, loot, disable, exit and return to your ship are separate mandatory interactions. Read the mission's “If you are stuck” note below before fighting more unrelated enemies.
The renewed Republic–Imperial conflict starts on Ossus. The Imperial storyline differs from the Republic campaign; make sure you are not using the Republic opening route.
Use the full map (default M), confirm the tracked purple mission in the log (default L), and switch to the current floor after a door or lift. Your chosen Combat Style determines combat abilities, but the Imperial campaign route applies to Sith Warrior, Sith Inquisitor, Imperial Agent and Bounty Hunter, with class-specific dialogue or scenes where applicable.
Evidence boundary: This guide verifies the named mission sequence and broad entrances from quest records. It does not claim to have personally tested every interior turn, lift or coordinate. Where exact navigation has not been verified, follow the named phase and the current in-game mission breadcrumb.
Important routing and progression notes
Beginning Ossus early can auto-complete earlier expansion stories. This guide assumes you have completed the traitor arc.
The named Hearts and Minds story follows Ossus and is required for the proper Onslaught opening.
Daily areas unlock after the one-time planet story; they are not prerequisites for the next expansion.
Combat: use a healing companion when available, interrupt dangerous enemy channels and use the defensive abilities suitable for your Combat Style in boss encounters. Some scripted chapters temporarily change companions or playable characters.
TRUE IN-GAME VISUAL REFERENCES
Published maps and screenshots
These links open the original publishers’ in-game maps and screenshots. IDS does not copy those images or present schematic directions as screenshots. Story-phase floors can differ from the exterior or daily-area map.
Enter Ossus through the story route and follow the Imperial mission briefings, finding the named Imperial camp and Jedi archaeological facilities.
Start
Use the ship's BLUE Mission Console to accept Jedi Under Siege after Nathema.
Finish
Finish the faction-specific Ossus confrontations and complete the end-of-campaign story report.
The route to follow
Active purple story mission→Ossus Imperial staging area; Jedi ruins→Jedi Under Siege: Imperial story→Next story handoff
Find the starting contact or mission
Use the ship's BLUE Mission Console to accept Jedi Under Siege after Nathema.
Identify the correct destination and entrance
Area: Ossus Imperial staging area; Jedi ruins. Track 'Jedi Under Siege: Imperial story' in the Mission Log. Inspect the world or region map first, then use the named interior doorway, phase entrance or lift indicated by the active mission.
Locate the next landmark 1
Follow the Imperial OSSUS story introduction and meet LANA BENIKO near X -159, Y 199 for NO SOLDIER LEFT BEHIND, assisting Major Anri in searching for missing Raven Squad member Brax.
Locate the next landmark 2
Find SERGEANT BRAX near X 595, Y 658 for INFILTRATION; secure the Imperial SUPPLY DROP before the Jedi. The follow-up BLACKOUT starts from the IMPERIAL DROP near X 311, Y -491 and requires disabling the Jedi communications array.
Locate the next landmark 3
After Blackout, locate the MASTER CONTROL CONSOLE near X 1213, Y -635 to begin DESECRATION and join Darth Malgus's assault on the JEDI LIBRARY.
Locate the next landmark 4
The next story is HEARTS AND MINDS. Its Imperial giver is MASTER GNOST-DURAL on Ossus near X -921, Y -126; do not return to the ship hoping for an immediate Onslaught start.
Finish the chapter's required interaction
Enter Ossus through the story route and follow the Imperial mission briefings, finding the named Imperial camp and Jedi archaeological facilities.
Complete the handoff to the next mission
Finish the faction-specific Ossus confrontations and complete the end-of-campaign story report.
Confirm progression before departing
Check the Mission Log for a completion or the next story title. If the objective is still active, read the stuck guidance below; repeatable Flashpoint runs and bonus tasks can differ from the story-linked version.
Cannot find the objective?
The correct Imperial chain changes giver four times: Lana → Sergeant Brax → Imperial Drop → Master Control Console. It is NOT the Republic Lost Colony chain, and Hearts and Minds begins with Master Gnost-Dural after Desecration.
Other activities: Friendly Fighters, Sabotaging Fighters, Canyon Clutter and Blaze A Trail are bonus tasks; some depend on loyalist or saboteur choice.
Mission or chapter sequence and named settings are researched from the cited mission task record where provided. Descriptions identify real task names and phase changes; unverified left-right turns are deliberately not invented.
Go to its named Alliance conversation location and complete the short political briefing.
Start
Speak to Master Gnost-Dural on Ossus near X -921, Y -126 after Desecration; follow the short Alliance leadership mission.
Finish
Return to the Fleet or ship when Preparing the Way becomes available to start Onslaught.
The route to follow
Active purple story mission→Alliance headquarters; ship mission handoff→Hearts and Minds→Next story handoff
Find the starting contact or mission
Speak to Master Gnost-Dural on Ossus near X -921, Y -126 after Desecration; follow the short Alliance leadership mission.
Identify the correct destination and entrance
Area: Alliance headquarters; ship mission handoff. Track 'Hearts and Minds' in the Mission Log. Inspect the world or region map first, then use the named interior doorway, phase entrance or lift indicated by the active mission.
Locate the next landmark 1
After DESECRATION, speak to MASTER GNOST-DURAL on OSSUS near X -921, Y -126 to begin HEARTS AND MINDS on the Imperial route.
Locate the next landmark 2
Complete the Alliance leadership conversations requested by the quest. This is a separate short story mission, not an Ossus daily-area checklist.
Locate the next landmark 3
After Hearts and Minds, visit Vaiken SPACEDOCK / Imperial Fleet to locate LORD IZAR for PREPARING THE WAY, the beginning of Onslaught.
Finish the chapter's required interaction
Go to its named Alliance conversation location and complete the short political briefing.
Complete the handoff to the next mission
Return to the Fleet or ship when Preparing the Way becomes available to start Onslaught.
Confirm progression before departing
Check the Mission Log for a completion or the next story title. If the objective is still active, read the stuck guidance below; repeatable Flashpoint runs and bonus tasks can differ from the story-linked version.
Cannot find the objective?
Do not look only in the ODESSEN war room to pick up Hearts and Minds; the Imperial quest record identifies Master Gnost-Dural on OSSUS as the story giver. The quest follows Desecration.
Other activities: Optional combat and bonus tasks are not required unless the active primary mission explicitly requests them.
Mission or chapter sequence and named settings are researched from the cited mission task record where provided. Descriptions identify real task names and phase changes; unverified left-right turns are deliberately not invented.
