Open sourceFreeCommercial
Build the Game · Engine
Godot Engine
A free, open-source engine for cross-platform 2D and 3D
A community- and foundation-led engine with a scene system, editor, scripting, rendering, physics, and export tools.
RESOURCE LIBRARY
Resource Library
Filter the full catalog by discipline, capability, production stage, resource type, pricing, platform, and ecosystem.
Open sourceFreeCommercial
Create the World · Tool
Blender
Open-source 3D creation suite for modeling, animation, rendering, and compositing
A mature cross-platform suite for characters, environments, animation, materials, and promotional renders, with common engine handoff formats such as glTF and FBX.
Paid onceCommercial
Launch & Reach Players · Service
Steamworks
Ship PC games on Steam and manage the full store lifecycle.
The partner portal covers store pages, build delivery, wishlists, achievements, sales reporting, and updates.
FreemiumCommercial
Keep It Growing · Service
GameAnalytics
Understand retention, progression, economies, and churn with game-focused metrics.
It provides events, funnels, cohorts, retention, remote config, A/B testing, and SDKs for major engines.
Open sourceFreeCommercial
Test & Polish · Tool
RenderDoc
Open-source frame debugger spanning major graphics APIs
RenderDoc captures a rendered frame and exposes draw calls, pipeline state, resources, meshes, shaders, and outputs across major desktop APIs and Android.
FreeTerms apply
Set the Direction · Reference
SteamDB
Read Steam store, product, and player trends
A third-party Steam database covering product history, pricing, concurrent players, tags, and store changes.
FreemiumTerms apply
Build the Game · Engine
Unity
A broad-ecosystem engine for multiplatform real-time development
A C#-centered 2D and 3D platform spanning editing, rendering, physics, asset management, and multiplatform builds.
Source availablePaid onceCommercial
Create the World · Tool
Aseprite
Professional editor tailored to pixel art, sprite sheets, and frame animation
Aseprite combines pixel-precise drawing, layers and frames, tags, palettes, onion skinning, and sprite-sheet export in a focused workflow.
FreeCommercial
Test & Polish · Reference
Game Accessibility Guidelines
Tiered checklist of basic, intermediate, and advanced game accessibility practices
The reference covers motor, cognitive, visual, hearing, speech, and language barriers with examples of improvements for game design and testing.
FreemiumTerms apply
Design & Validate · Tool
Figma
Collaborate on and validate game interface flows
A browser-based interface design and interactive prototyping platform with components, collaboration, and shareable tests.
Source availableUsage basedTerms apply
Build the Game · Engine
Unreal Engine
A complete toolchain for high-fidelity real-time 3D
Epic Games' real-time 3D engine with C++, Blueprints, rendering, animation, physics, level tools, and multiplatform support.
Open sourceFreeCommercial
Create the World · Tool
Tiled
Mature open-source editor for tile maps, object layers, and world layouts
Tiled supports orthogonal, isometric, and hex maps, infinite canvases, custom properties, templates, and world files, with importers across many engines.
Usage basedCommercial
Launch & Reach Players · Marketplace
itch.io
Publish, sell, or freely distribute indie games and prototypes.
It supports customizable pages, pay-what-you-want pricing, early access, preorders, bundles, analytics, and build uploads.
Usage basedCommercial
Keep It Growing · Service
PlayFab
Add accounts, economy, leaderboards, analytics, and LiveOps to an online game.
Microsoft's managed platform covers player data, content configuration, economy, experiments, matchmaking, servers, and events.
Open sourceFreeCommercial
Test & Polish · Tool
Tracy Profiler
Low-overhead open-source CPU, GPU, and memory profiler for real-time software
Tracy combines client instrumentation with a standalone viewer for frames, thread zones, locks, call stacks, allocations, and GPU timing in native code and custom engines.
FreemiumTerms apply
Set the Direction · Learning
How To Market A Game
Build practical marketing judgment for indie games
Articles, courses, and case studies for indie developers, with a strong focus on Steam positioning, wishlists, and launch cadence.
Open sourceFreeCommercial
Design & Validate · Tool
Excalidraw
Discuss systems and flows with low-friction sketches
An open-source, hand-drawn whiteboard for gameplay loops, state flows, level sketches, and technical diagrams.
FreemiumTerms apply
Create the World · Tool
FMOD Studio
Game-audio middleware for interactive music, sound events, and live mixing
FMOD Studio structures adaptive audio with events, parameters, buses, snapshots, and live connection, alongside Unity, Unreal, and low-level API integrations.
Open sourceFreemiumCommercial
Keep It Growing · Framework
Nakama
Self-host accounts, social systems, leaderboards, matchmaking, and realtime multiplayer.
The open server provides storage, economy, chat, tournaments, notifications, and Go, TypeScript, or Lua runtime logic.
Open sourceFreeCommercial
Build the Game · Tool
Git
Keep code and text-based asset history traceable and recoverable
A distributed version-control system using commits, branches, and merges for source and text-friendly project files.
Open sourceFreemiumCommercial
Design & Validate · Tool
Penpot
Design and validate game interfaces on an open platform
A self-hostable open-source interface design and prototyping platform with components, design tokens, responsive layout, and live collaboration.
FreemiumTerms apply
Build the Game · Service
GitHub
Host code, review changes, and connect to the open-source ecosystem
A Git development platform providing collaboration, issues, reviews, releases, packages, and automation.
Open sourceFreeCommercial
Create the World · Asset
Kenney Game Assets
Commercial-friendly CC0 library of game art, UI, audio, and prototype assets
Kenney publishes cohesive packs spanning 2D, 3D, interface, audio, and placeholder content that can be downloaded and used immediately.
FreeTerms apply
Test & Polish · Service
Steam Playtest
Free Steam feature for controlled player testing alongside the main store page
Steam Playtest creates a separate test app ID with sign-ups, staged access, build distribution, and feedback gathering without affecting reviews for the main game.
Usage basedCommercial
Launch & Reach Players · Marketplace
Epic Games Store Distribution
Publish games to PC and mobile players with Epic's self-service tools.
The developer portal manages product pages, offers, builds, achievements, reporting, and updates.
FreemiumTerms apply
Set the Direction · Service
VG Insights
Research the Steam market with structured data
A market-intelligence platform for Steam sales and revenue estimates, publishers, genre trends, and competitor filtering.
Open sourceFreeCommercial
Design & Validate · Tool
Color Oracle
Preview what players with color-vision impairments see
An open-source full-screen color-vision simulator that runs independently of art and engine tools on Windows, macOS, and Linux.
FreemiumTerms apply
Build the Game · Engine
GameMaker
Build 2D games quickly with a focused, approachable workflow
A 2D engine combining visual editing and GML, targeting desktop, web, mobile, and licensed console exports.
Open sourceFreeCommercial
Create the World · Tool
Krita
Open-source canvas for digital painting, concept art, and frame animation
Krita combines flexible brush engines, layers, color management, seamless textures, and a 2D animation workspace for concepts, characters, backgrounds, and texture painting.
FreemiumTerms apply
Create the World · Tool
Wwise
Mature interactive-audio platform from authoring through runtime integration
Wwise provides events, states, switches, dynamic music, spatial audio, profiling, and multiplatform runtimes for production game-audio pipelines.
FreemiumTerms apply
Design & Validate · Tool
Machinations
Turn economies and system loops into executable models
A cloud modeling platform for diagramming and simulating game economies, resource flows, and systemic behavior.
Open sourceFreemiumCommercial
Design & Validate · Engine
GDevelop
Turn game rules into a playable prototype with events
An open-source, no-code-first engine using events, behaviors, scene editing, and multiplatform export for 2D and lightweight 3D.
Source availableFreeCommercial
Build the Game · Engine
Defold
A lightweight, free, cross-platform Lua game engine
A complete engine governed by the Defold Foundation, including editor, Lua runtime, build service, and extension system.
Open sourceFreeCommercial
Create the World · Tool
LDtk
Modern level and world editor designed around indie 2D production
LDtk organizes levels, layers, entities, fields, auto-tiles, and worlds, exporting stable JSON with integrations for several engines.
Source availableFreemiumTerms apply
Test & Polish · Service
Sentry
Crash and performance monitoring for Unity, Unreal, Godot, and native games
Sentry collects errors, native crashes, and performance events with release, device, and contextual data so field failures can be tied to a specific build.
FreemiumCommercial
Keep It Growing · Service
Backtrace
Centralize production crashes, exceptions, and native dumps from games.
Game and mobile workflows include grouping, symbolication, search, alerts, release comparison, and impact ranking.
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