Introduction
Party size is not bookkeeping. It changes action economy, role coverage, recovery, skill access, flanking, target selection, and how scary one failed save becomes. A severe encounter for four fresh, balanced characters can become a miserable ambush for three tired characters missing their healer. A solo boss that terrifies four players can become a public meeting for six players with reactions, summons, conditions, and focus fire.
Use this with encounter building, combat, three-action economy, conditions, Hero Points, monsters, stat blocks, and custom monsters.
Quick Adjustment Table
| Situation | First adjustment | Watch out for |
|---|---|---|
| Three PCs | Remove support enemies, reduce action denial, add escape or recovery options | Solo monster crits and failed saves can swing too hard. |
| Four PCs | Use default assumptions | Still check role coverage and player experience. |
| Five PCs | Add objectives, support enemies, terrain, or hazards before just increasing damage | More player turns can erase one enemy too quickly. |
| Six or more PCs | Split pressure across roles and objectives | Turns can become slow; avoid too many low-impact enemies. |
| One absent player | Adjust for the missing role, not just the missing body | No healer, no scout, or no frontliner changes the whole session. |
| New or tired players | Lower complexity before lowering drama | Severe math plus decision fatigue is a rough combination. |
The Adjustment Workflow
| Step | Question | Adjustment |
|---|---|---|
| 1 | What changed? | Headcount, party role, resources, player experience, map control, or source access. |
| 2 | What is the scene job? | Boss duel, ambush, resource drain, clue defense, chase, hazard lesson, or set-piece objective. |
| 3 | Which side has more useful actions? | Compare meaningful first-two-round actions, not just bodies. |
| 4 | What should stay intact? | Keep the boss, clue, hazard, objective, terrain lesson, or social consequence that made the scene worth running. |
| 5 | What is the lightest fix? | Remove a support enemy, weaken a hazard, add cover, add a minion, change terrain, add a fallback, or shift the objective. |
Small Parties
Small parties have fewer actions to recover from bad luck. One grab, one failed Will save, one downed frontliner, or one enemy crit can consume the whole table's turn economy. This is why small-party encounters should be adjusted around control, burst, and recovery, not just creature level.
| Pressure | Why it hurts small parties | Safer adjustment |
|---|---|---|
| Too many enemies | Enemy actions outnumber PC actions and flanking becomes easy. | Remove a support enemy or combine roles into fewer creatures. |
| Solo brute with high burst | One crit can down a character and remove a large share of party actions. | Use weak adjustment, telegraph danger, add terrain, or lower damage pressure. |
| Hard action denial | Grabbed, stunned, slowed, confused, or dominated effects remove a huge share of table agency. | Use these sparingly or give counterplay through terrain, Recall Knowledge, or allies. |
| No healer or Medicine user | Recovery and heroic comeback options shrink. | Add consumable treasure, NPC aid, safer rest windows, or lower attrition. |
| No skill specialist | Hazards, locks, clues, and social scenes can bottleneck. | Offer alternate paths and let clever tools matter. |
For a three-player party, removing a supporting enemy is often cleaner than weakening the main enemy. The scene still has a centerpiece, but the party gets enough actions to breathe.
Large Parties
Large parties do not just have more damage. They have more reactions, more flanking, more Recall Knowledge attempts, more emergency healing, more debuffs, and more ways to invalidate a single monster. Increasing monster numbers can work, but it can also slow play. The better fix is usually varied pressure.
| Problem | Better than adding HP |
|---|---|
| Solo boss gets buried | Add terrain, minions, reactions, objectives, hazards, or a second role enemy. |
| Six PCs focus fire one target | Split goals: ritual stones, hostages, moving enemies, alarm bells, escape routes, or battlefield devices. |
| Turns take too long | Use fewer, more meaningful enemy bodies and clear enemy tactics. |
| Party covers every skill | Increase complexity through consequences, time pressure, and competing priorities, not hidden gotchas. |
| Defensive party never feels threatened | Use objectives, movement, area effects, and enemies that force choices beyond "stand here." |
For a five-player party, adding one support enemy or a hazard is often better than turning the boss into a padded wall. For six or more, objectives matter more than raw stat increases.
Missing Players
When a player is absent, ask what left the table.
| Missing role | Encounter impact | Adjustment |
|---|---|---|
| Frontliner | Back-line characters are exposed and enemies can reach casters faster. | Reduce melee pressure, add terrain, or avoid enemies built only to punish soft targets. |
| Healer | Damage sticks and dying pressure rises. | Add potions, reduce attrition, or lower enemy burst. |
| Scout | Ambushes and hazards become harsher. | Add clearer clues, alternate detection methods, or less punishing surprise. |
| Knowledge character | Weaknesses, saves, and traits are harder to identify. | Use visible monster behavior and environmental clues. |
| Face | Social encounters can become binary. | Let reputation, bribes, evidence, or alternate skills carry scenes. |
| Controller | Large enemy groups become more dangerous. | Reduce enemy count or give terrain the party can exploit. |
The worst absent-player adjustment is pretending nothing changed, then blaming the party for failing at a role nobody brought.
Companions, Familiars, Summons, And Allies
Do not count every extra body as a full PC. Count what it changes.
| Extra body | Usually counts as | GM read |
|---|---|---|
| Animal companion | Body, flanking, damage, blocking, sometimes scouting | Can strongly affect corridors and front-line math. |
| Familiar | Scouting, delivery, utility, patron or thesis support | Rarely equal to a PC in combat, but can change exploration and action logistics. |
| Summoned creature | Temporary body, blocker, flanker, utility, action sink | Strong when used for positioning and objectives, not just damage. |
| NPC ally | Depends on stat block and agency | Keep allied NPCs simple and avoid stealing player turns. |
| Battlecry troop or garrison support | Battlefield pressure and scene scale | Treat as scenario structure, not just an extra creature. |
Use companions and familiars, summoned creatures, troops and garrisons, and war campaigns when these pieces become central.
Player Core 2 Class Adjustments
| Class | What it changes |
|---|---|
| Alchemist | Consumables, weaknesses, splash damage, poisons, bombs, and formula access can change encounter prep. |
| Barbarian | Big melee pressure wants room, targets, and consequences that do not only punish Rage. |
| Champion | Reactions and protection make target choice more interesting. Do not always attack around the Champion; sometimes make protection matter. |
| Investigator | Clues, Recall Knowledge, and pre-fight information can lower encounter danger through smart play. |
| Monk | Speed, mobility, stances, and action compression make map design more important. |
| Oracle | Divine support and curse pressure create strong swings depending on pacing. |
| Sorcerer | Spontaneous casting smooths repeated combat but may need scrolls or allies for niche utility. |
| Swashbuckler | Panache and style skills need movement, social stakes, and targets that let the class engine appear. |
Adjusting Without Breaking The Scene
| Original scene | Bad adjustment | Better adjustment |
|---|---|---|
| Boss with two guards | Remove the boss | Remove one guard, weaken a guard, or add a terrain escape valve. |
| Ambush in ruins | Delete surprise and all terrain | Keep the ambush clueable through exploration choices and reduce burst damage. |
| Hazard plus monsters | Remove the hazard entirely | Lower hazard severity, make counterplay clearer, or reduce enemy count. |
| Large-party boss | Triple HP | Add objectives, minions, reactions, or terrain that splits actions. |
| Social confrontation | One Diplomacy roll decides everything | Use influence, leverage, reputation, evidence, and consequences. |
Preserve the thing the encounter is about. If the point is "fight while the bridge burns," keep the bridge. Adjust the enemies around it.
Monster And Hazard Adjustments
Use Monster Core, Monster Core 2, creatures by level, and elite and weak adjustments for creature-side tuning. Use hazards when traps, haunts, or environmental threats are part of the encounter budget.
NPC Core: When A Quick Adjustment Fits
NPC Core treats elite and weak adjustments as light combat tuning. Use one when a creature's job stays the same and its physical-combat pressure needs a modest shift. A guard who should be a little less punishing for a small party is a good candidate. A spellcaster who needs different magic, or a court expert who needs a stronger social role, is not.
Quick adjustments change numbers, not the special abilities that make a spellcaster or specialist useful in a scene. For a different NPC job, use encounter building to rebuild the scene around the creature's actual role. A specialist NPC's creature level is its combat level; use its specialist level when the competition is professional rather than a fight.
| NPC situation | Best adjustment decision |
|---|---|
| Physical guard or brute needs a modest combat shift | Use an elite or weak adjustment once, while keeping its role and tactics intact. |
| Spellcaster or ability-driven NPC needs a new role | Build for the needed spells and abilities instead of relying on a quick numerical pass. |
| Social, craft, or professional rival matters outside combat | Use the specialist level for the contest, not the creature's combat level. |
| The change is major or would require repeated adjustments | Choose a more suitable creature or use the creature-building guidance behind encounter building. |
Hot Take: An elite or weak adjustment is a bad fix for a spellcaster or social specialist. The missing abilities and scene job matter more than a numerical bump.
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| Tool | Best use |
|---|---|
| Remove a creature | Best for small parties when enemy actions are the real problem. |
| Add a support creature | Best for large parties when solo enemies get overwhelmed. |
| Weak adjustment | Good when a centerpiece is too dangerous but should remain present. |
| Elite adjustment | Use carefully; it can push accuracy and DCs into frustrating territory. |
| Add terrain | Makes movement, cover, Athletics, Acrobatics, ranged choices, and spells matter. |
| Add objective | Strongest large-party fix because it divides actions without bloating HP. |
| Change tactics | Fair when the creature's intelligence, morale, and goals support it. |
Difficulty And Recovery
Encounter adjustment also depends on where the scene sits in the day. A moderate encounter after several fights, low resources, and no healing window can feel severe. A severe encounter after full rest, scouting, buffs, and perfect terrain can feel fair.
| Party state | Adjustment note |
|---|---|
| Full resources | Printed difficulty is more reliable. |
| Low HP or few focus points | Reduce burst, add recovery opportunity, or lower enemy count. |
| No Hero Points | Be careful with death spirals and save-or-lose pressure. |
| Strong scouting | Let preparation pay off; do not rewrite the encounter to punish good play. |
| Bad luck streak | Hero Points and visible escape routes keep tension from becoming resentment. |
Common Mistakes
| Mistake | Fix |
|---|---|
| Adjusting only by XP | Also check action economy, roles, recovery, and terrain. |
| Buffing solo monsters with only HP | Add decisions, not just turns of attacking the same bag. |
| Counting familiars as PCs | Count actual impact, not creature count. |
| Ignoring absent roles | A missing healer or frontliner changes danger more than one missing damage dealer. |
| Removing every hard choice | Adjust danger while preserving the encounter's job. |
| Punishing good preparation | If players scout and prepare correctly, let that lower difficulty. That is the reward. |
Related Guides
Use GM guide, encounter building, custom monsters, hazards, Hero Points, combat, three-action economy, conditions, companions and familiars, and monsters.
