For players deciding the best class for Siege in Space Marine 2, Tactical is the safest all-round pick for public squads. Auspex Scan gives all three players one target to erase before the defensive line breaks.
Key points
- Siege is a three-player PvE mode on Kadaku.
- Tactical is the recommended general class because Auspex Scan creates a squad-wide damage window.
- Siege 2.0 added new purchases, bosses, objectives, Blessings, and Atonements.
- Atonements are disabled on Normal difficulty under hotfix 13.2.
Siege is a three-player PvE mode set on Kadaku. Each run combines escalating waves, side objectives, requisition terminals, reinforcements, and extraction. Tactical is the most flexible starting choice. Bulwark is stronger when melee pressure keeps dropping the team, while Heavy needs a protected firing lane.

Best class for Siege in Space Marine 2: the quick answer
Pick Tactical when you need a reliable class without knowing your teammates. Mark a Terminus enemy, an Extremis threat, or the Majoris pack blocking a revive. Wait until allies can shoot or use their abilities, then call the Scan and focus fire.
Do not use Scan the instant it recharges. Holding it through a quiet wave is often the correct choice. A well-timed Scan on a boss or a dangerous pack is worth far more than a personal damage spike.
Key takeaways
- Tactical is the best general choice because Auspex Scan creates a shared damage window.
- Choose Bulwark when the squad needs a close-range anchor and safer revives.
- Choose Heavy only when teammates can keep enemies out of its firing lane.
- Use requisition to solve the next threat, not simply because a terminal is available.
- Move sectors together and extract when the next sequence cannot be funded safely.
Best class for Siege Space Marine 2 build: Tactical
Use a weapon you can control consistently. Then favour perks that improve Scan uptime, team damage against marked targets, or reinforcement control where your available perk tree supports it. Read the in-game perk text before committing points, because Saber can adjust class interactions in patches.
Priority order during a Siege run
- Before the wave: take position near the next defence axis and keep the squad together.
- At the first dangerous pack: remove enemies that stop movement or threaten a downed ally.
- When a boss appears: call the Scan, choose an accessible weak point, and avoid three isolated duels.
- At the terminal: buy only what fixes the next concrete problem.
- At a sector change: leave together and extract when resources are no longer sufficient.
When Bulwark or Heavy is better
Bulwark is the strongest alternative when players keep falling at close range. Heavy is excellent on a stable lane, but needs teammates to hold enemies away from its firing position.
Mistakes that end strong Siege runs
- Using Scan every wave: use it only when the marked threat can die immediately.
- Buying by habit: check ammunition, charges, and squad health before spending requisition.
- Playing Siege like a normal Operation: resources must survive the next wave and sector.
Follow balance changes in the official Patch 13.0 notes and the official 13.2 hotfix notes. You can also browse jeu.video articles, gaming news, and the latest posts.
Frequently Asked Questions
What class should I pick for my first Siege run?Pick Tactical. Its Scan gives a public squad a clear target priority without requiring a fixed team composition.
Use it on a boss, an Extremis enemy, or a Majoris pack that blocks a revive or sector hold.
Prioritise perks that improve Scan value, charge recovery, team damage against marked enemies, or reinforcement control.
Use Bulwark when repeated melee pressure causes downs or failed revives. Stay close to both teammates.
Heavy needs a firing lane and teammates who stop enemies before they reach it.
No. Spend only when ammunition, charges, health, or an upcoming objective creates a specific problem.
Extract when the squad lacks the position or resources to handle the next sequence safely.
Check the official Patch 13.0 notes and 13.2 hotfix notes.
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