Yes, you can play S.O.N.A.R. alone
You do not need a full crew to start S.O.N.A.R. - Submarine Operators Not Actually Ready. The publisher lists single-player Training, a campaign for one to six players, and Open World Survival for one to six players. Start with Training to learn the submarine's systems, then take those responsibilities into the mode you want to play alone.
The important adjustment is workload: a solo captain still needs to understand navigation, diving, contacts, weapons, and damage control. A one-player starting point does not mean there is only one system to learn.
Begin with single-player Training
Training is the clearest first stop because the official S.O.N.A.R. game overview specifically identifies it as a single-player mode. Use that opportunity to learn what each operating station contributes before trying to manage a mission's competing demands.
Build familiarity around the responsibilities the developer describes:
- Helm and navigation: understand how the submarine is steered and how its movement is managed.
- Diving: learn the separate responsibility for controlling the submarine's depth.
- Sonar and observation: become familiar with identifying contacts and understanding the information available to the crew.
- Weapons: learn the relationship between loading ammunition and operating the submarine's weapons.
- Damage control: recognize the tools and systems involved in leaks, fires, and other failures.
This is a practice order, not a claim that the game forces one particular training sequence. The goal is to understand the stations before an urgent problem pulls you away from another job.
Choose campaign or survival for your next solo session
The full game's published mode list gives you two relevant options after Training:
| Mode | Published player support | What you are taking on |
|---|---|---|
| Co-op campaign | 1–6 players | Missions involving jobs such as combat, escort, stealth, and treasure recovery |
| Open World Survival | 1–6 players | Exploration, ports, resources, upgrades, and ongoing survival |
Choose the campaign if you want a mission to organize your next session around. Choose survival if you want to explore and manage a longer-running submarine journey. These are choices about the kind of session you want, not a promise that one mode is always easier for a solo captain.
For either option, consider how you will move between responsibilities. Before concentrating on weapons or a contact, know what you will need to check when you return to navigation. Before leaving to address damage, identify the system that needs attention. That planning follows directly from handling several station duties yourself.
Keep older solo descriptions in context
The developer's September 4, 2026 FAQ describes a smaller submarine intended to let one captain maneuver and manage the primary systems. That is useful background on the game's solo design, but it is a pre-release description rather than a current, step-by-step submarine-selection guide.
For current player counts, use the full-release information. The publisher's mode list and October 29 launch announcement support one-to-six-player cooperative play, while Team Deathmatch is a separate 6v6 format. Do not carry the older FAQ's 4v4 versus description into your expectations for the released game.
The available official material establishes solo support without documenting every lobby click, AI-crew setting, or boat-selection option. Follow your installed game's prompts for those details rather than assuming a menu path from a different build.
FAQ
Can I play S.O.N.A.R. without friends?
Yes. Single-player Training is available, and the published campaign and Open World Survival modes both support one player.
Which mode should I start with alone?
Start with Training to learn the operating stations. Afterward, choose campaign missions or Open World Survival according to the kind of session you want.
Does the game have a smaller solo submarine?
The developer described a smaller single-player submarine in its September 4, 2026 FAQ. That dated description does not establish the exact selection steps or configuration in every later build.
Is Team Deathmatch the solo mode?
No. The full game's advertised Team Deathmatch format is 6v6 submarine-versus-submarine combat. Training, campaign, and Open World Survival are the modes relevant to starting alone in the published mode list.