update · February 27, 2024
Stellaris Update 3.11.1 Eridanus Adjusts Technology Costs and Ship Upkeep
Stellaris patch 3.11.1 Eridanus introduces a difficulty-adjusted technology cost slider, separates tech and tradition sliders, and rolls out sweeping adjustments to ship upkeep and economic civics.
Paradox Interactive has deployed the 3.11.1 Eridanus update for Stellaris, bringing extensive balance passes to empire economics, ship maintenance, and technology pacing alongside numerous bug fixes.
Galaxy Generation and Technology Pacing
Technology and tradition costs are now distinct sliders in galaxy setup, accompanied by a new difficulty-adjusted technology costs slider that scales requirements based on tier and difficulty. Ascension Theory is now classified as a Tier 4 technology requiring at least six completed tradition trees. Empire size penalties to technology have been increased to match their effects on traditions, and base technology costs have generally risen, particularly for higher tiers.
Economy, Civics, and Job Adjustments
Bio-Reactors are now Tier 1 rare technologies that reduce farmer food output in exchange for energy output, while Advanced Bio-Reactors trade food for exotic gas. Resort worlds feature new resort workers and districts that provide empire-wide bonuses to amenities and trade value. Spiritualist MegaCorps now utilize Prosperity Preachers instead of a split between priests and managers in Ecclesiastical Arcologies. Furthermore, civics such as Anglers and Eager Explorers now swap correctly when reforming into a megacorp.
Fleet Maintenance and Component Balance
Most sources of ship cost and upkeep reductions have been removed from traditions, civics, and traits across the game. Bulwark ship upkeep reductions are halved, corporate Crusader Spirit reduces upkeep by 5 percent instead of 10 percent, and the Master Shipwright tradition no longer reduces ship build costs. Rapid Sniper Stock rate of fire multipliers have been reduced for the G7 Scout, Longbow DMR, and Triple Take equivalents in weapon balancing.
Bug Fixes and Quality of Life
Armies now disband instantly instead of waiting for the next tick, and pre-sapients can no longer be purged by driven assimilators with protected policies. Resort worlds receive better designation bonuses, and leader trait picks are corrected to prevent generating opposite traits. Marauder ships feature increased armor across most sizes, and refugees are now willing to flee to Rogue Servitors if welcomed as bio-trophies.
Why this patch matters
The Eridanus update tightens economic progression by stripping away widespread ship upkeep discounts and separating technology pacing from traditions, creating a more demanding strategic environment.