Yes — ANOMALITH is single player only. It supports one player, with no co-op, no multiplayer mode, no invasions and no online component on PS5, Switch 2 or Steam. The Steam listing carries only the Single-player category, and the official site lists the player count as one.
Where that is confirmed
Three independent sources say the same thing. Steam's category list for app 4017880 includes Single-player and nothing resembling co-op or multiplayer. FuRyu's English site lists "Number of Players: Single-player". The Nintendo product page lists "1 player".
None of them mention crossplay, invites, lobbies or online sessions. For a game built around tense resource management, that is a design choice rather than a missing feature.
What solo-only changes about the game
The dive loop is: prepare at base, enter an Anomaly Zone, decide what to carry, and get out. In a co-op game that loop becomes a negotiation about who carries the ammo. Here it is a private calculation, and the pressure comes from knowing nobody is coming to revive you.
Previewers who played the demo describe the same effect from the other direction: the game rewards aggressive play, but a bad call costs you the whole run because there is no teammate to cover the retreat. The isolation is doing narrative work as well — Reona is looking for a missing friend, alone, on purpose.
No online requirement
There is no online mode, so the game does not need a subscription to play. On PS5 that means no PlayStation Plus requirement for the campaign; on Switch 2 there is no Nintendo Switch Online dependency for gameplay.
Cloud saves are a separate matter. Steam Cloud is confirmed for the PC build, so progress follows the account rather than the machine. On console the save lives on the system and follows the platform's own account rules.
If you wanted co-op horror
This is the part where expectations matter. ANOMALITH is not a co-op horror game with a solo option — it is a single-player game, full stop. Anyone buying it to play through with a friend will be disappointed on the first boot, not the tenth hour.
The genre has plenty of co-op horror, but this is not one of them. If shared scares are the point for you, this is the wrong purchase regardless of how good the game is.
What you get instead
The compensation is density. One player means the enemy behaviour, the ammo economy and the zone layouts are tuned to a single variable — you. The twelve Anomalization skills are balanced around one character's resource pool, and the extraction decision is yours alone rather than a group vote.
That is also why the game can afford to be quiet. Long stretches of exploration with almost no music only work when there is nobody chatting over them.
Family sharing and multiple profiles
Steam lists Family Sharing, so a household can share the PC copy under Steam's rules. On console, the standard account-based sharing applies, and saves are per profile.
Since there is no online account for the game itself, there is no separate login to manage and no server-side save to lose. That is one practical advantage of a solo-only release: the game cannot be taken offline in a way that locks you out.
The short version
- Players: one.
- Co-op: none.
- Multiplayer: none.
- Online required: no.
- Crossplay: not applicable.
If a store page or a video suggests otherwise, it is describing a different game. ANOMALITH is a solo survival shooter, and every system in it assumes you are the only person in the room.
Why the loop suits one player
Extraction pressure is a resource argument you have with yourself. Add a second player and it becomes a negotiation: who carries the ammo, who takes the upgrade, who stays behind. That can be a great game, but it is a different one.
Here the design keeps the argument internal. The inventory is yours, the ammo is yours, and the decision to extract is not subject to a vote. That is why the game can be quiet for long stretches without feeling empty.
What solo design costs
Single-player only means no drop-in help and no-one to show you the ropes. The game compensates with an operator character in your ear, a base full of NPCs and a report system that explains enemies, but none of that replaces a person.
It also means the difficulty curve is fixed rather than scaled to a party. A boss tuned for one player is either fair or it is not; there is no co-op to smooth it over.
What to do if you wanted company
Play it as a single-player game and treat the operator as the companion. If that is not enough, this is simply the wrong title — no patch will add co-op to a game built around a solo resource economy.
The demo is the cheapest way to find out whether the isolation reads as atmosphere or as loneliness. Two hours is enough to tell.
Reading a solo game's difficulty curve
Without co-op, difficulty has to come from systems rather than from other players. Here it comes from three places: ammunition scarcity, inventory limits and enemy behaviour that punishes standing still.
That combination produces a curve that is steep at the start and flattens as your equipment catches up. It also means the adjustable difficulty setting is doing real work: turning it down does not remove the loop, only the punishment for a bad decision.
The practical consequence for a new player is that the first two hours are harder than the tenth, which is the opposite of most action games and worth knowing before you judge it.
One more thing about saves
Because there is no online account, your progress lives on the machine rather than on a server. That is convenient until a drive fails or a console is replaced, at which point the only backup is the platform's own cloud service.
Steam Cloud covers the PC build. On console the save lives on the system, so check the platform's backup setting before you are fifty hours in rather than after.
One practical upside of solo design: the difficulty setting is the only thing standing between you and the game's pace. There is no party composition to fix and no matchmaking to wait for, so a hard encounter is a setting change rather than a scheduling problem.