DIRECT ANSWER

Cobalt is the defensive energy faction: Overload, Shield Generators, Energy Lab tech, Leviathan and Burster. Slaraash unlocks after Chapter 2 and shifts toward Acid pools, drones, the Acid Vat and Incubator, with Carrier and Stinger as signature ships. Choose by the build engine you want, not a universal tier list.

Fleetbreakers Cobalt and Slaraash faction artwork
Guide artwork: Cobalt and Slaraash are built around different combat engines, not a universal tier order.
Fleetbreakers faction comparison artwork
Guide artwork: Cobalt leans into shields and Energy while Slaraash leans into Acid and drones.

Cobalt and Slaraash solve fights differently

Official August 2026 faction notes describe two Early Access factions with distinct mechanics, damage types, colonies, ships and progression. Cobalt is the starting story faction; Slaraash becomes freely selectable for Story and Free Play after Chapter 2.

SystemCobalt ExpeditionSlaraash Swarm
Primary damage identityEnergy → builds OverloadAcid → can create damaging pools
Defensive engineShield Generators replenish between individual battlesDrones can add damage, healing or mitigation depending on build
Build colonyEnergy LabAcid Vat / Incubator
Named unique shipsLeviathan, BursterCarrier, Stinger
AvailabilityPrelude + first two chaptersUnlocks after Chapter 2

Pick Cobalt if you want controlled defense and Overload

Cobalt makes the most sense when you enjoy setting up a protected fleet, building shield infrastructure and turning concentrated energy fire into Overload explosions. Its unique ships cover both heavy specialist pressure and agile close-range assault.

Pick Slaraash if you want area denial and drone scaling

Slaraash builds can turn the battlefield itself into a weapon. Acid pools punish space, while drone packages can be pushed toward firepower, sustain or protection. The Carrier and Stinger reinforce that “swarm + piercing pressure” identity.

Your first story run is a Cobalt run

Because Slaraash stays locked until after Chapter 2, your opening chapters effectively double as a Cobalt tutorial. Plan accordingly: starting relics and colony tech that strengthen shields, Overload or the Energy Lab keep paying off during the only chapters you can play, while Slaraash-specific plans wait for the unlock or for Free Play. July 2026 notes confirm bosses work with any faction in Free Play, which makes it the low-stakes place to learn a new faction without story pressure.

Distinguish faction tools from enemy balance

Version 0.2.808 reduces enemy base ships per squadron, hitpoints and shield rating, limits simultaneous enemy squadrons, and reduces drone enhancements on enemy Slaraash Stations. These are opponent changes; do not turn them into an invented percentage nerf to every player Slaraash build.

Drones no longer count toward Cobalt Overload accumulation, and Slaraash Barrier Stations no longer gain drones from unintended enhancements. Choose the faction by the tools and effects shown in your current build, then use the matching faction guide for these interactions.

Sources & version note

EA v0.2.811 · Updated 2026-11-04. Use the released version named beside the task; announced later updates have separate conditions.