Not everyone plays Space Marine 2 with a coordinated squad. Plenty of players run Operations solo, with two AI companions filling the empty slots. That changes the calculus for class selection, because the AI will keep you company and deal damage but will not set up combos, prioritize the right specials, or bail you out of a bad position reliably. Choosing a self-sufficient class makes those runs far smoother.
This assessment was checked in October 2026 against class discussion on the r/Spacemarine subreddit, the community wiki, and published guides from outlets such as GameRant. Class balance changes with patches, so test your pick in-game rather than treating any ranking as permanent.
What changes when you go solo
The core difference is that you cannot rely on teammates to cover your weaknesses. In a human squad a fragile but high-damage class is fine because others protect it. Solo, your AI allies will not consistently peel enemies off you, break a Zoanthrope’s shield on cue, or pick you up quickly in a dangerous spot. That pushes the best solo classes toward self-sufficiency: strong independent survivability, a tool to deal with ranged specials, and enough damage to end fights before ammo runs dry.

The AI is genuinely useful, though. It rarely dies carelessly, revives you when it can reach you, and contributes steady damage to swarms. The trick is picking a class that complements reliable but unimaginative support rather than one that needs clever teamwork to function. Think of the AI as dependable backup that handles the broad middle of a fight while you take responsibility for the decisions it cannot make.
It also helps to adjust your expectations on pace. Solo runs often take longer, because you are doing the work of a thinking player plus covering the gaps two AI allies leave. That is fine, and leaning into a measured, deliberate approach rather than racing objectives is usually the faster path to a clean clear.
Classes that reward self-reliance
The Bulwark is a standout for solo play because its shield and banner make it independently durable. It can hold ground, heal itself and nearby AI, and survive mistakes that would down a squishier class, buying the time a solo player needs to think. Its weakness against ranged threats is softened by AI allies who chip at distant targets, though you will still want to close on specials yourself.
The Tactical is the other strong solo choice thanks to its flexibility. With access to a broad weapon pool and the Auspex Scan to delete priority targets, it can answer most situations without relying on anyone. A Tactical that carries a ranged weapon with reach can handle the Zoanthropes and sorcerers the AI tends to ignore, which is exactly the gap solo play exposes.
Both picks share a theme: they can function as a complete package. They bring their own survivability, their own answer to priority targets, and enough flexibility to adapt when the AI misreads a situation. That completeness is what you are really looking for when no human is there to fill the holes in your kit.
Classes that need more care solo
Highly aggressive melee classes such as Assault and Vanguard are thrilling in a coordinated group but demand more discipline alone, because diving into a crowd without backup can leave you surrounded with no one to peel. They are absolutely viable solo for confident players, but they punish overextension harder than the AI will punish an enemy on your behalf.

The Sniper is a curious case. Its range and cloak give it strong independent survivability and it excels at deleting the ranged specials the AI neglects, which is a real solo strength. The trade is that it contributes less to melee crowd control, so you lean on AI allies to hold the line while you snipe, and that works until the line breaks and the swarm reaches you.
None of these classes are off-limits solo, and skilled players clear the hardest content with every one of them. The point is simply that they ask more of you alone, so if you are new to solo play or climbing into unfamiliar difficulty, the more forgiving picks let you focus on learning the encounter rather than babysitting your own fragility.
Building for solo survivability
Whatever class you choose, solo loadouts should lean defensive and self-sufficient. Favor perks that return armor or health through your own actions rather than ones that reward team setups, carry a ranged option that can reach specials the AI ignores, and respect ammunition because there is no teammate to cover you while you scrounge. Difficulty pacing matters too: the AI scales reasonably but will not pull off clutch plays, so climb one tier at a time.
Positioning discipline is the solo player’s real skill. Fight where you control the angles, avoid being flanked by a swarm you cannot see, and treat every special enemy as your responsibility, because the AI will not reliably make it theirs. Using corridors, corners, and natural chokepoints to limit how many enemies can reach you at once does more for a solo run than almost any gear upgrade.
Getting the most from AI teammates
Your AI companions are more capable than they first appear, and playing around their strengths makes solo runs noticeably smoother. They survive competently, revive you when they can physically reach you, and apply steady damage to swarms, which means they are excellent at mopping up fodder while you focus on the decisions they cannot make. Think of them as reliable labor rather than tacticians.
Because the AI will not reliably prioritize specials or break a Zoanthrope’s shield on cue, treat those jobs as yours by default. Likewise, positioning so that your AI allies are near enough to revive you matters, since a down in a spot they cannot reach can end a run that was otherwise going well. Staying loosely grouped with your companions gives you the revives and chip damage that make the difference on a long mission.
It also helps to let the AI absorb some attention. Companions draw aggro and soak hits, giving you windows to reposition, reload, or line up a priority kill. Using those windows deliberately, rather than fighting as if you were truly alone, is a big part of what separates a comfortable solo clear from a grind.
Pacing and patience in a solo run
Solo runs reward a measured pace. Without human teammates to cover a reckless push, sprinting into fresh spawns before you are ready is the fastest way to get surrounded, so advancing deliberately and clearing methodically is almost always correct. The AI will not punish you for taking your time, and a controlled tempo lets you handle each threat on your terms rather than fighting several at once.
Patience extends to difficulty choice. Climb one tier at a time and let your loadout and class level catch up before attempting the next, because the AI scales reasonably but will not produce the clutch plays that bail out an under-geared human squad. A solo player who respects the ladder and builds for self-sufficiency will reach the hardest content eventually; one who rushes it tends to stall and get frustrated.
Choosing your difficulty when solo
Difficulty selection matters more solo than it does in a coordinated group, because you have no human teammates to bail out an attempt that goes wrong. The sensible approach is to sit one tier below where you feel pressure, farm your unlocks there until your class and weapons are comfortably ahead of the curve, and only then test the next step. The AI scales with difficulty but will not produce clutch plays, so your own consistency is the real limiter.
Pay attention to how a tier feels rather than just whether you clear it. If you are scraping through on your last segment of armor every mission, you are probably a step too high for efficient farming, and dropping down to build power is faster than repeatedly grinding out near-wipes. Solo progression rewards patience: let your loadout lead your difficulty, not the other way around, and the hardest content becomes a reachable goal instead of a wall.
A small habit helps here: note which segment of a mission keeps catching you out, whether it is a particular defense hold, a boss, or a swarm-heavy stretch, and practice that part at a lower tier until it stops threatening you. Solo play exposes your weakest moment more harshly than a squad does, so shoring up that single bottleneck often unlocks the next difficulty on its own.
The verdict for queuing alone
For most solo players the Bulwark and Tactical are the safest, most forgiving picks, with the Sniper a strong option for players who like to handle ranged threats personally. Aggressive melee classes reward skill but ask more of you without human backup. The best choice is ultimately the class whose rhythm you enjoy enough to master, because mastery beats any tier list when the AI is your only company.
To go deeper, our overall best class guide compares all six head to head, and if the Bulwark appeals, the Bulwark build guide covers the self-sufficient setup solo play wants. New to the mode entirely? Start with the Operations guide.
Frequently Asked Questions
Can you solo Operations in Space Marine 2?
Yes. Empty squad slots are filled with AI companions, so you can complete any Operation alone, though the AI will not coordinate class abilities or prioritize specials as well as human teammates.
What is the best solo class?
The Bulwark and Tactical are the most forgiving solo picks thanks to independent survivability and flexibility. The Sniper is strong if you enjoy personally handling ranged threats.
Are AI teammates any good?
They survive well, revive you when reachable, and deal steady damage to swarms, but they will not set up combos or reliably kill priority specials, so those become your job.
Can I solo the hardest difficulties?
It is possible but demanding. Climb one tier at a time, build defensively, and expect fights to take longer without human coordination.
Is the Assault class bad for solo?
Not bad, but less forgiving. Its aggressive melee style can leave you surrounded without backup, so it rewards disciplined, confident play alone.
How should I build for solo play?
Favor self-sufficient perks that return armor or health through your own actions, carry a ranged option that can reach specials the AI ignores, and manage ammunition carefully.