Use a contained boss sequence to practice and earn mode-local cells for upgrades.
PC / Global, base game and installed DLC routes labeled
WHERE & HOW TO FARM
Where to farm
Boss Rush Tier 1 trial door in Prisoners’ Quarters.
Tier 1 Boss Rush is a structured set of boss fights with run-contained cells and build choices. It can help you practice a boss sequence while collecting currency for the end-of-mode Forge or Collector. The cells do not carry into normal play, and the mode’s temporary item choices should be treated as tools for that trial rather than permanent unlocks.
Choose a build color and be prepared to spend cells at the end.
Enter the Tier 1 trial and review its starting choices.
Choose a color that matches the weapons or skills you prefer to use.
Engage each boss and learn its attack cues before committing to long damage windows.
Collect cells dropped by the bosses as the fights progress.
Use available item choices to support the remaining encounters rather than chasing a perfect loadout.
Defeat the final boss in the sequence.
At the mode’s end, invest cells at the Legendary Forge or Collector before exiting.
Farming tips
Use Tier 1 to practice clean dodges and parries before attempting a harder trial.
Choose a usable build early; a coherent setup is more valuable than delaying for a perfect item.
Repeat, collect and use
Repeatable as an available trial. Cells are earned and spent within each Boss Rush run; one-time blueprint rewards, if applicable to a mode milestone, do not repeat indefinitely.
Common mistakes
Leaving with cells unspent; they do not transfer out of Boss Rush.
Expecting temporary trial loot to become a permanent unlock; use the Collector to pay for actual blueprints.
Ignoring defensive play because the tier is called Tier 1; surviving the entire sequence is required to cash out.
When to stop or switch
Stop once the end-of-run spending is complete; move to a higher tier only when you can finish Tier 1 reliably.
