/axiom-games

name: axiom-games
description: Use when building ANY 2D or 3D game with SpriteKit, SceneKit, or RealityKit, or adding touch controls or game controller support. Covers scene graphs, ECS, physics, actions, game loops, rendering, TouchController, GCController.
license: MIT

Games

**You MUST use this skill for ANY game development, SpriteKit, SceneKit, RealityKit, touch controls, game controller, or interactive simulation work.**

<!-- AXIOM_AUDITOR_INLINE_BEGIN — rewritten for Codex by scripts/build-codex.ts; do not hand-edit --> > **Auditors are skills here.** Where this router says "Launch `some-auditor` agent", invoke the > matching Codex skill instead — same procedure, no Claude Code agent required. > > Available: `axiom-audit-spritekit`. > > The ones that shell out — builds, tests, simulators, crash symbolication — need shell access to run. <!-- AXIOM_AUDITOR_INLINE_END -->

Quick Reference

| Symptom / Task | Reference | |----------------|-----------| | Building a SpriteKit game | See `skills/spritekit.md` | | Adding touch controls to a game (TouchController) | See `skills/game-input.md` | | Game controller input (GCController, polling vs handlers) | See `skills/game-input.md` | | Controller Home button settings, spatial accessories `OS27` | See `skills/game-input.md` | | Game window resizing, orientation lock, UIRequiresFullScreen `OS27` | See axiom-uikit (skills/uikit-modernization.md) | | SpriteKit API lookup | See `skills/spritekit-ref.md` | | Physics contacts not firing | See `skills/spritekit-diag.md` | | Frame rate drops (SpriteKit) | See `skills/spritekit-diag.md` | | Touches not registering | See `skills/spritekit-diag.md` | | Memory spikes in gameplay | See `skills/spritekit-diag.md` | | Coordinate confusion | See `skills/spritekit-diag.md` | | Scene transition crashes | See `skills/spritekit-diag.md` | | Objects tunneling through walls | See `skills/spritekit-diag.md` | | SpriteKit node/action reference | See `skills/spritekit-ref.md` | | SceneKit maintenance/migration | See axiom-graphics (skills/scenekit.md) | | SceneKit API / migration mapping | See axiom-graphics (skills/scenekit-ref.md) | | RealityKit (3D, ECS, AR) | See axiom-graphics (skills/realitykit.md) | | RealityKit API reference | See axiom-graphics (skills/realitykit-ref.md) | | RealityKit diagnostics | See axiom-graphics (skills/realitykit-diag.md) | | RealityKit 27 game features (navmesh, LOD, splats) | See axiom-graphics (skills/realitykit-ref.md Part 10) | | Long-session game performance tracing (metalperftrace) | See axiom-graphics (skills/display-performance.md Part 12) | | Porting a Mac/Windows game to Metal | See axiom-graphics (skills/metal-migration.md) | | In-game content, asset packs, IAP | See axiom-integration (skills/background-assets.md, skills/in-app-purchases.md) |

External Routes

These topics are part of the broader games/3D domain but live in separate skill suites:

**SceneKit (3D — soft-deprecated iOS 26):**

• Maintenance and migration planning → See axiom-graphics (skills/scenekit.md)
• API reference and migration mapping → See axiom-graphics (skills/scenekit-ref.md)

**RealityKit (3D — modern):**

• ECS architecture, AR, SwiftUI integration → See axiom-graphics (skills/realitykit.md)
• API reference → See axiom-graphics (skills/realitykit-ref.md)
• Troubleshooting → See axiom-graphics (skills/realitykit-diag.md)
• 27-cycle game-engine layer: navigation mesh + pathfinding, behavior trees, animation graphs, LOD, Gaussian splats → See axiom-graphics (skills/realitykit-ref.md Part 10)

**Game performance and porting:**

• Long-session game traces, metalperftrace CLI, Game Performance Overview template → See axiom-graphics (skills/display-performance.md Part 12)
• Metal migration, shader conversion → See axiom-graphics (skills/metal-migration.md)

**In-game content and monetization:**

• Apple-Hosted Background Assets, asset packs, Steam depot conversion → See axiom-integration (skills/background-assets.md)
• In-app purchase, StoreKit views → See axiom-integration (skills/in-app-purchases.md)

**Windowing and orientation (OS27):**

• Every app resizes at 27, iPhone included. `UIRequiresFullScreen` now means discrete snap-resizing for games (not a fullscreen opt-out); orientation lock is a preference; minimum size via `sizeRestrictions` → See axiom-uikit (skills/uikit-modernization.md)
• Game runs in iPhone Mirroring: trackpad/mouse input reaches custom gestures as indirect events, and the scene always reports portrait → See axiom-uikit (skills/uikit-modernization.md)
• Metal drawable sizing, render-target reallocation, and quality throttling during live resize → See axiom-graphics (skills/resizable-rendering.md)

Decision Tree

digraph games {
    start [label="Game development" shape=ellipse];
    what [label="Which framework?" shape=diamond];
    sprite_what [label="SpriteKit need?" shape=diamond];

    start -> what;
    what -> sprite_what [label="SpriteKit (2D)"];
    what -> "skills/game-input.md" [label="touch controls / game controllers"];
    what -> "axiom-graphics/scenekit" [label="SceneKit (3D legacy)"];
    what -> "axiom-graphics/realitykit" [label="RealityKit (3D modern)"];
    what -> "axiom-graphics/metal-migration" [label="porting (Metal)"];

    sprite_what -> "skills/spritekit.md" [label="architecture/patterns"];
    sprite_what -> "skills/spritekit-ref.md" [label="API lookup"];
    sprite_what -> "skills/spritekit-diag.md" [label="broken/slow"];
}

1. Building/designing a 2D SpriteKit game? → `skills/spritekit.md` 2. How to use a specific SpriteKit API? → `skills/spritekit-ref.md` 3. SpriteKit broken or performing badly? → `skills/spritekit-diag.md` 4. Adding touch controls, or handling game controller input? → `skills/game-input.md` 5. Maintaining existing SceneKit code? → See axiom-graphics (skills/scenekit.md) 6. SceneKit API reference or migration mapping? → See axiom-graphics (skills/scenekit-ref.md) 7. Building new 3D game or experience