Starfinder 2E - Chapter 1: Introduction

Source URL: https://2e.aonsrd.com/rules/1-chapter-1-introduction

Overview

Starfinder is a science fantasy tabletop roleplaying game set after the Gap, featuring exploration across the Pact Worlds and beyond. The game emphasizes player choice determining story outcomes through collaborative narrative and mechanics.

Three Modes of Play

Exploration Mode

Free-form investigation, problem-solving, and interaction. Used when traveling, exploring, or engaging in non-combat activities.

Encounter Mode

Structured combat or time-critical challenges with initiative and rounds. Used when timing matters and every action counts.

Downtime Mode

Extended periods for recovery, crafting, research, and long-term goals. Measured in days or longer.

Action Economy (Encounters)

Characters receive:

• 3 actions per turn
• 1 reaction per round (usable off-turn)
• Free actions (don't count toward the action limit)
• Activities require multiple actions combined

Check System

All uncertain outcomes use checks: roll d20 + relevant modifier versus Difficulty Class (DC).

Check Outcomes

Proficiency Ranks & Bonuses

Combat Fundamentals

Initiative

Perception check determines action order at the start of combat.

Attack Rolls

Proficiency bonus + attribute modifier versus target's Armor Class (AC).

Damage

Weapon damage + modifiers. Critical hits deal double damage.

Multiple Attack Penalty

• Second attack: -5 penalty (-4 with agile weapons)
• Third attack: -10 penalty (-8 with agile weapons)

Saving Throws

Hit Points & Conditions

• Damage reduces HP
• Conditions impose penalties or restrict actions

Character Creation (10 Steps)

Step 1: Create a Concept

Define your character's archetype and personality.

Step 2: Start Building Attributes

Start all attributes at +0. Apply boosts and flaws during subsequent steps.

Step 3: Select an Ancestry

Choose your heritage. Gain:

• Hit Points
• Size and Speed
• Languages
• Ancestry feat

Step 4: Pick a Background

Select your upbringing. Gain:

• Skill training
• Background feat

Step 5: Choose a Class

Choose your profession. Gain:

• Key attribute boost
• Class features
• Class feat

Step 6: Finish Attributes

Apply 4 remaining free attribute boosts.

Step 7: Record Class Details

Record:

• Total HP (ancestry HP + class HP)
• Proficiencies
• Class features
• Spells (if applicable)

Step 8: Buy Equipment

Spend 150 credits on starting gear.

Step 9: Calculate Modifiers

Determine:

• Perception modifier
• Saving throw modifiers
• Strike modifiers
• Skill modifiers

Step 10: Finishing Details

Record:

• Armor Class (AC)
• Bulk capacity
• Spells known/prepared
• Deity (if applicable)
• Age, appearance, personality

Starting Statistics

Hit Points

Ancestry HP + Class HP

Armor Class

10 + Dexterity modifier (capped by armor) + armor proficiency + armor bonus

Skills

Proficiency ranks vary by class and background.

Attribute System

Six Attributes

Attribute Modifiers

• Range from -5 to +5 for ordinary creatures
• Starting characters capped at +4
• Each +1 modifier represents a significant advantage

Key Mechanical Terms

Level

Ranges from 1-20 for player characters. Measures power progression.

Experience Points (XP)

1,000 XP = one level

Feats

Selected abilities representing specialized training or natural talent.

Skills

Proficiencies in specific tasks like Athletics, Computers, Diplomacy, etc.

Spells

Magical or technological effects. Typically two-action activities. Spell ranks range from 1-10.

Conditions

Ongoing effects modifying actions or statistics (e.g., frightened, prone, dying).

Proficiency System

Five ranks measure character aptitude in specific tasks:

Proficiency applies to:

• Weapons
• Armor
• Skills
• Saving throws
• Spellcasting
• Perception

Game Structure

Sessions

Several hours of play. Campaigns span multiple sessions.

Adventures

Single narrative arc with a story setup, plot, and conclusion.

Rounds

Approximately 6 seconds of game time. All participants take turns in initiative order.

Turns

Up to 3 actions per character during their initiative turn.

Rarity System

Social Contract

Gaming requires mutual agreement on fun and comfort. Groups should:

• Discuss preferred content
• Establish boundaries before play begins
• Respect all players' comfort levels
• Communicate openly about session expectations

Required Tools

Essential Materials

• Character sheets
• Polyhedral dice (d4, d6, d8, d10, d12, d20)
• Published or homebrew adventure
• Starfinder Alien Core (for monsters and NPCs)

Recommended Materials

• Maps or battle mats
• Miniatures or tokens
• Digital tools (optional)

Dice Notation

Game Master Role

The Game Master (GM):

• Controls the world and NPCs
• Adjudicates rules
• Creates or runs adventures
• Determines difficulty classes
• Awards experience points
• Manages pacing and story flow
• Ensures everyone has fun

Player Role

Players:

• Create and control their characters
• Make decisions for their characters
• Roll dice for checks and actions
• Collaborate with the group
• Engage with the story and world
• Respect other players and the GM

Summary

Starfinder 2E combines science fiction and fantasy in a d20-based system. Characters progress from level 1 to 20, using a three-action economy in encounters, exploration activities between fights, and downtime for long-term projects. The proficiency system scales with level, ensuring characters improve across all areas as they gain experience. With clear degrees of success and a robust attribute system, every roll matters and every character choice shapes the story.