I’d pick Starfinder First Edition for clear crew jobs, Traveller for ship-system detail, and Stars Without Number Revised for shared-resource teamwork. Before choosing, count your players - not your ship’s seats - and check that everyone has at least two worthwhile choices in a normal round.
I compare these rules by crew actions, teamwork, player count, and combat pace. The key difference? Having a station doesn’t always mean having something useful to do.
Quick Comparison
| Rules | How players contribute | Crew fit | Main trade-off |
|---|---|---|---|
| Traveller, Mongoose Second Edition (2022 update) | Manage thrust, weapons, sensors, and repairs through assigned equipment. | Small crews divide duties; large crews need enough useful stations. | More ship detail means more checks and tracking. |
| Starfinder First Edition | Work through five core roles in set phases. | Best suited to crews that can staff most or all five roles. | Clear turns still leave players waiting between phases. |
| Stars Without Number Revised Edition | Generate and spend shared Command Points across five departments. | Different player counts can share duties. | Support turns can become routine point generation. |
My test: run a 20- to 30-minute fight with your actual group. Then ask each player what choice changed the fight. Judge the decisions, not the number of seats.
TTRPG Ship Combat: Traveller vs. Starfinder vs. SWN
Crew Roles and Player Choices
These roles serve similar purposes across games, but they aren’t matching stations. What matters isn’t how many roles a system names. It’s how often each player gets to make a choice. Traveller assigns work by equipment; Starfinder uses fixed roles; Stars Without Number uses departments.
| Role and responsibilities | Traveller | Starfinder | Stars Without Number Revised Edition |
|---|---|---|---|
| Command: coordinate crew actions | Captain actions depend on ship organization and available departments. | Help allies or disrupt enemies. | Coordinate departmental actions. |
| Piloting: maneuver and evade | Manage thrust and positioning; assign astrogation separately. | Control movement and perform stunts. | Maneuver, evade, and position the ship through the bridge department. |
| Engineering: maintain power and systems | Maintain and repair installed drives, including maneuver and jump drives. | Divert power or patch damaged systems. | Manage power, repair systems, or generate Command Points (CP). |
| Weapons: select targets and fire | Operate assigned turrets or weapon bays. | Fire assigned weapon mounts. | Spend shared CP to fire weapons. |
| Sensors or communications: gather information and interfere | Detect or jam targets using available equipment. | Use Scan to assess enemies or Balance to redistribute shields. | Conduct electronic warfare, jamming, and sensor work through comms. |
Timing gives a role something to do. Starfinder places engineering before helm and gunnery, so repairs and power choices affect movement and shooting. During the helm phase, the science officer can act before or after the pilot. The captain can act in any phase, keeping that role useful throughout the round. In Stars Without Number, spending shared CP on one department leaves fewer options for the others.
Extra seats need to bring extra decisions, not just more crew names. Traveller’s additional gunners need separate turrets or bays, with different weapons covering different targets and ranges. Starfinder allows multiple engineers and science officers, but only one captain and one pilot. Each weapon mount supports at most one gunner or gunner team. Stars Without Number lets players share a department and choose different actions, though shared CP and available systems still limit those choices.
Before assigning seats, list what each player can choose in a normal round. With two or three players, combine duties rather than treating all five roles as required seats. With four or five, check that every assignment offers meaningful choices. For a sixth player, identify another useful weapon, engineering, or information-gathering task.
1. Traveller (Mongoose Second Edition, 2022 Core Rulebook Update)
Crew Roles and Actions
Assign combat stations before the fight. The captain’s Tactics (Naval) can affect initiative, and Leadership can help coordinate the crew when the referee allows the task. Neither replaces another crewmember’s action.
Engineers handle the power plant, maneuver drive, jump drive, or damage control. Each turret and bay weapon has an assigned gunner and can fire once per round using the appropriate Gunner specialty. The gunner can fire any or all weapons in that emplacement.
Teamwork and Trade-offs
The pilot has a direct trade-off: spend Thrust to move or save it to dodge. Maneuver-drive engineering can help with mobility, while a sensor lock gives attacks against that target +1 DM. For missiles, that bonus applies to the initial Gunner check - not each missile roll.
Communications jamming, breaking enemy locks, and smart-missile defense depend on the target and available equipment. They aren’t guaranteed jobs every round. Smart-missile defense begins with a Difficult (-2) Sensors check. Success disables one missile and allows further attempts until failure, with a cumulative -1 DM for each additional attempt.
Crew Size and Station Coverage
One or two players have fewer choices and more stations left uncovered. Combining duties doesn’t grant free actions: piloting, firing, sensor locking, and engineering still compete for a character’s attention and require the right skills. Before play, confirm which combinations are allowed and what penalties apply. Don’t assume there’s a universal multitasking penalty.
Three or four players can cover piloting, weapons, and sensors while combining engineering or command duties with other roles. Five or more players can take dedicated stations, but the ship and encounter must give them useful work. A jump engineer won’t automatically have an engaging combat turn if the drive is stable and no one is preparing to escape.
Tactical Detail and Combat Pace
Traveller suits crews that enjoy managing a ship’s limits, especially Thrust, targeting, damage, and weapon choices. Separate checks for multiple weapons, electronic warfare, missiles, and repairs can slow combat down.
Before initiative, identify each station’s immediate task. Keep rarely used communications options off the action reference. If your group prefers speed over detail, agree on simpler sensor or missile procedures as house rules, rather than presenting them as part of the core system.
2. Starfinder First Edition
Crew Roles and Actions
Starfinder splits each round into engineering, helm, and gunnery. Each character normally gets one starship action per round. The captain acts in just one phase, and changing roles doesn’t grant extra actions. Some actions also require a minimum level or number of skill ranks.
The test is simple: does each role offer a meaningful choice every round, or just a seat with a title?
| Station | When it acts | Representative choices | How it affects others |
|---|---|---|---|
| Engineer | Engineering | Divert power to engines, shields, or weapons; repair or patch damaged systems. | Can improve maneuvering, science actions, or weapons; repairs keep damaged systems online. |
| Pilot | Helm | Roll Piloting to determine movement order; change speed, maneuver, or evade. | Movement shapes firing opportunities, protection from enemy fire, and whether attacks can reach the target. |
| Science officer | Helm | Scan, find weaknesses, target systems, or rebalance shields. | Information helps the crew choose targets; shield balancing protects an exposed quadrant. |
| Gunner | Gunnery | Choose targets and fire available weapons. | Turns engineering support, pilot positioning, and sensor data into damage. |
| Captain | One chosen phase | Encourage, demand, or taunt. | Supports a key crew check or disrupts an enemy’s selected phase. |
Teamwork and Trade-offs
Diverting power means choosing what the crew needs most. Power sent to science equipment gives +2 to science actions that round. Weapon power instead turns damage dice of 1 into 2. Pilots also roll for movement order every round, so positioning shifts rather than following a fixed turn order.
Crew Size and Station Coverage
A two- or three-player crew usually needs to combine stations. The captain can help fill gaps by acting in one phase, but that still doesn’t grant extra actions. Starfinder works best when the group can staff most or all dedicated stations.
A four- or five-player crew can usually cover captain, engineer, pilot, science officer, and gunner as separate stations. With six or more players, some crew members may still need secondary assignments. Multiple engineers can act during engineering, while extra gunners need open weapon mounts. Before choosing a ship, check its frame’s minimum crew complement and the limit of one gunner or gunner team per mount.
Tactical Detail and Combat Pace
Starfinder gives each core role a clear handoff, but each turn has a narrow scope. Don’t expect every player to stay active throughout the round. The fixed phases give each role a job, though they also make combat predictable. Stars Without Number addresses the same problem through shared departmental actions rather than fixed seats.
3. Stars Without Number Revised Edition
Crew Roles and Actions
Stars Without Number Revised Edition divides ship duties into five departments: bridge, gunnery, engineering, comms, and captain. The captain decides the department order, and each department takes one departmental or general action. There’s no separate sensor-operator subsystem or detailed power-allocation mechanics. Everyone gets a turn, though some roles offer more choices than others.
Teamwork and Trade-offs
Command Points (CP) give support actions a purpose. Player ships usually start at zero, and unused points disappear at the end of each round. Do Your Duty and Above and Beyond generate points that other departments spend on movement, repairs, support, or attacks.
Departments must generate CP before anyone can spend them, so turn order matters. Choosing between generating CP, making immediate repairs, or taking comms actions gives players a real decision. But spending every turn fueling the gunner’s next attack can feel mechanical. SWN puts coordination ahead of detailed station management.
Crew Size and Station Coverage
With three players, some must cover multiple departments. With four, one character still handles two departments. Five players can fill all five roles.
Sharing departments lets different crew sizes play, but smaller crews can’t cover every function cleanly. Extra players can serve as relief crew, respond to crises, or support boarding actions. They don’t automatically get separate specialist roles with equally engaging turns.
Tactical Detail and Combat Pace
SWN runs on shared resources rather than precise flight simulation; range and position remain abstract. Where Traveller uses equipment-based assignments and Starfinder uses fixed seats, SWN asks players to contribute to - and spend from - the crew’s shared budget.
Keep departmental action sheets within reach, assign one person to track CP, and announce planned spending before rolling. NPCs use fixed Command Point totals of 4–7, so the GM doesn’t have to manage a second full crew economy.
Strengths and Limits of Crew Specialization
An available action only matters if it changes the fight. Judge each station by what happens when its player chooses differently - not by how many checks the rules offer.
| System | Role coverage | Tactical depth | Crew-size flexibility | Downtime or repetition risks |
|---|---|---|---|---|
| Traveller - Mongoose Second Edition | Specialists matter most when damage, thrust, or targeting changes the next decision. | Tracking systems rewards players only when priorities compete. | Small crews divide duties; larger crews need enough useful stations. | Changing conditions give specialists time to shine; steady priorities make turns repetitive. |
| Starfinder First Edition | Fixed roles give players clear jobs, but some offer more to do than others. | Repairs, shields, and maneuvers compete for attention. Phases keep turns orderly, but each role still has few choices. | Extra engineers and science officers cover more duties; captain, pilot, and weapon-mount limits restrict that coverage. | Turns are predictable, but players wait through other phases. |
| Stars Without Number Revised | Shared resources keep support roles involved, though often by setting up someone else’s action. | Competing demands reward coordination; an obvious spending plan leaves less room for choice. | Shared resources suit groups of different sizes, but extra players don’t automatically get separate duties. | Generating resources keeps players involved, but routine point generation can leave someone spending their turn preparing another character’s action. |
Role count alone doesn’t tell you how much each player gets to do. Check whether every role offers at least two worthwhile choices in a typical round. That gives you a way to approach the next question: which system fits your crew’s size and pace?
Choosing Rules for Your Crew
Count players, not seats. Pick a system whose turns fit your crew size and give everyone the kinds of decisions they want to make each round.
| Crew size or preference | Recommended system | Why every player stays involved | Key caveat |
|---|---|---|---|
| Two players | Stars Without Number Revised Edition | Shared-resource decisions keep both players involved. | Assign the required departments before play. |
| Three to four players covering multiple stations | Traveller (Mongoose Second Edition) or Starfinder First Edition | Traveller rewards splitting technical duties; Starfinder rewards fixed stations. | Check station coverage and limits on switching roles. |
| Five or more players taking dedicated stations | Starfinder First Edition | Five core roles suit a full bridge crew. | Extra gunners need available weapon mounts. |
| Cinematic speed | Stars Without Number Revised Edition | Shared resources keep turns fast. | You still need department coverage. |
| Technical ship operations | Traveller (Mongoose Second Edition) | Best for players who want hands-on ship system management. | Check ship stations before assigning roles. |
| Clear phase-based teamwork | Starfinder First Edition | Best for groups that want a predictable phase order. | Predictable timing doesn't mean fewer procedures. |
Test the fit with one 20- to 30-minute battle using your actual player count. Afterward, ask each player to name one decision they made that changed the outcome. If someone can't, adjust assignments or switch rulesets before the campaign starts.
FAQs
How can I keep support roles from feeling repetitive?
Make support actions change the battlefield through clear trade-offs. Engineers might choose between powering shields and weapons, while comms coordinates electronic warfare. Connect these choices to crew-wide objectives so support means more than routine healing or buffs.
Vary hazards, routes, and enemy goals so the best support choice shifts with the situation. Share the spotlight through structured group decisions, giving every player a role-specific turn that matters - not the same routine every round.
Can NPC crew fill empty stations without overshadowing players?
Yes - NPC crew can fill empty stations when ship roles matter and depend on one another, while players stay in charge of key decisions.
Each station should offer choices that change outcomes. Engineers might balance power and shields, while comms coordinates electronic warfare. NPCs should cover gaps, not take over the action. Giving every participant a role that can make a difference helps keep the team balanced as crew sizes change.
How can I design encounters that challenge every crew role?
Give every crew member an active role that matters. Engineers can manage shields or weapon power, while communications officers handle electronic warfare or coordinate with allies.
Add tactical puzzles, such as unstable gravity or radiation zones, that call for several crew members’ expertise - not just pilot or gunner rolls. Share the spotlight and build challenges around each character’s strengths so everyone stays involved.
