Triumph

Bunker E15 Solo Expert

Complete the Bunker E15 Lost Sector on Expert difficulty, without a fireteam.

Requirements

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Bunker E15 Solo Expert is a triumph (5 points): complete the Bunker E15 Lost Sector on Expert difficulty without a fireteam.

Go in alone (no fireteam) and finish the sector on Expert. Expert is easier than Master: it has fewer Champions and no Attrition.

Bunker E15 is a Lost Sector in the Eventide Ruins on Europa. It is one of the easier Europa sectors, partly because freed Braytech Security Frames fight alongside you.

Launch from the Eventide Ruins landing zone and enter Bunker E15. Pick the difficulty from the activity card (Expert and Master are separate variants; Master is the one with Champions).
Entrance: stay elevated, kill the first Overload Captain and the basic Vex, then shoot the Vex cube on the cage to free the Security Frames, which draw enemy fire.
Cells: free more Exo prisoners for extra allies. Handle the two Barrier Hobgoblins and kill the Cyclops quickly (a rocket works).
Boss arena: kill the Overload Minotaurs/Captains and the Hydra boss, using the icy corridor for cover. A high-burst Super (for example Celestial Nighthawk) can skip the last Champion spawns.

Master modifiers: Locked Equipment (set your loadout first), Match Game (shields resist off-element damage), Void burn and shields, Shocker, Attrition; Barrier and Overload Champions. Expert has 3 Overload Champions and 1 Barrier; Master has 5 Overload and 2 Barrier.
Bring anti-Barrier (e.g. Arbalest, Forerunner, or a Void scout rifle) and anti-Overload (Solar auto/pulse, Le Monarque) options.
Suggested subclasses: Hunter Nightstalker, Titan Sunbreaker (Restoration offsets Attrition), Warlock Voidwalker.