Core Loop Design

Frameworks for designing gameplay cycles that keep players engaged. The core loop is your game's heartbeat — players don't remember features, they remember how it felt to play.

Core Principle

Every game loop has three phases:

[ACTION] → [FEEDBACK] → [REWARD] → repeat

The loop must be: Satisfying (feels good), Clear (know what to do), Variable (not monotonous), Progressive (mastery visible).

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Loop Hierarchy

Games have nested loops at different time scales:

Loop	Duration	Example
Micro	Seconds	Attack → Hit feedback → Damage
Core	Minutes	Clear room → XP → Level progress
Meta	Hours	Complete dungeon → New gear → Stronger
Session	Play session	Progress → Reason to return

Loops connect: Micro rewards → Core loop → Meta loop → Reason to continue.

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Loop Patterns

Action Loop

[Find challenge] → [Attempt] → [Succeed/Fail] → [Learn]

• Games: Platformers, action, skill-based
• Key: Failure teaches, success feels earned

Collection Loop

[Explore] → [Discover item] → [Add to collection] → [Unlock new areas]

• Games: Metroidvanias, adventure, collectathons
• Key: Items must be meaningful

Combat Loop

[Encounter] → [Fight] → [Victory] → [Loot/XP] → [Get stronger]

• Games: RPGs, action RPGs, roguelikes
• Key: Power progression feels meaningful

Build Loop

[Gather resources] → [Craft/Build] → [Use creation] → [New opportunities]

• Games: Survival, crafting, city builders
• Key: Building has purpose and visible impact

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Progression Types

Type	Player Gains	Feels Like
Vertical	More power	Getting stronger
Horizontal	More options	Getting versatile
Skill	Player improves	Getting better
Content	Access to more	Unlocking secrets

Progression Curves

• Linear / — Steady, predictable, can feel grindy
• Exponential early ╭─ — Fast start, good for onboarding
• Stepped ─┐─┐ — Dramatic power spikes with plateaus

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Economy Essentials

Sources and Sinks

[Sources] → Player inventory → [Sinks]
Enemies         ↕              Purchases
Exploration   Save/Load        Consumables
                               Upgrades

Balance rule: Sinks must match or exceed sources, or economy inflates.

Scarcity Creates Value

Control through: limited sources, time gating, location gating, skill gating.

Warning: Too much scarcity = frustration. Too little = meaninglessness.

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Feedback Intensity

Match feedback to action significance:

Action	Feedback
Basic attack	Small sound/visual
Critical hit	Big sound, camera shake
Level up	Fanfare, UI celebration
Boss defeat	Extended celebration

Checklist for each action:

• Visual feedback exists
• Audio feedback exists
• Feedback is immediate
• Intensity matches significance

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Flow State Design

Players enter flow when challenge matches skill:

Challenge
   ↑     FLOW ZONE (between too hard/too easy)
   └────────────→ Skill

Prevent negative loops:

• Death spiral: Fail → Lose resources → Harder → Fail again
  • Fix: Failure shouldn't compound difficulty
• Grinding trap: Stuck → Grind → Trivialize content → Boredom
  • Fix: Skill should matter more than grinding

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Session Design

Structure sessions: [Hook] → [Rising action] → [Peak] → [Cool down] → [Cliffhanger]

Design natural break points: after objectives, in safe zones, after story beats, before major challenges.

Target session length: _____ minutes

• Loop cycles fit session
• Progress feels meaningful
• Natural stopping points exist

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Related Skills

• game-balance — Balancing loop rewards
• player-psychology — Understanding engagement
• replayability-engineering — Loops for replayable games