PlayCanvas
A web-first game engine
 
Pixi’VN
Pixi’VN is a versatile and powerful visual novel/2D game engine. It is based on JavaScript/TypeScript and uses the PixiJS library for rendering.
  Snap!
A visual programming language inspired by Scratch.
 
GDevelop
A no-code, open-source, free, and easy 2D/3D game-making app
 
TIC-80
A free and open source fantasy computer for making, playing and sharing tiny games
  Decker
Decker is a multimedia platform for creating and sharing interactive documents and adventure games with sound, images, hypertext, and scripted behavior
 
SHMUP Studio
SHMUP Studio is a game creation system designed to create SHMUP games without coding, it has plenty of features and a full blown editor
  TilBuci
TilBuci is a free, open source tool to create interactive content, focused on building interactive narratives like visual novels.
 
Twine
An open-source tool for telling interactive, nonlinear stories
 
Capsule VN Engine
Capsule VN Engine is a lightweight, no-code game development tool designed for the creation and distribution of 2D visual novels using web technologies.
 
Kool
A multi-platform Vulkan / WebGPU / OpenGL game engine that works on Desktop Java, Android and browsers.
 
Narrat Engine
Narrat is a beginner-friendly game engine for making narrative games with RPG features, visual novels, interactive fiction, and more
  anitya
anitya is offers a low-code software toolkit designed to empower creators brands to effortlessly develop immersive 3D experiences, including gamified training modules, collaborative workshops, and e-commerce solutions.
 
modd.io
Modd.io is a low-code game engine where you can play & make games all in a browser with built-in netcode and free server hosting
  Flowlab
A no-code game maker that runs right in your browser. Flowlab makes it easy to get started making your own games. Publish your creations as iOS or Android mobile apps, or export for PC & Mac.
 
GameSalad
A game engine to build 2D games with no code.
 
Polygonjs
A procedural, node-based design & animation tool, for the web
 
Construct 3
Construct 3 is a powerful and user-friendly game development engine without the need for extensive coding knowledge
 
microStudio
microStudio is a free, open source game engine online
  Retro Puzzle Maker
A tool to help you create new puzzle games you can play on an NES
  AllBinary Platform
AllBinary Game Engine is a multi-platform game engine in Java. Entire game engine is also in 100% Kotlin. Supports: Android (Without native libraries in Java or Kotlin), HTML5, J2ME (MIDP), Windows Native (Avian), and J2SE (Java or Kotlin).
 
Bitsy
A little engine for little games, worlds, and stories
  DungeonScript
A variant of Puzzlescript featuring 3D graphics, a first person perspective, and no limit on 2D pixel and 3D voxel sprite resolutions
  Easel
Easel lets you code multiplayer games without coding the multiplayer. Code like all your players are in one shared world, like a singleplayer game, and Easel does the rest.
  EngineLol
An experimental web-based Game Engine to create simple interactive fiction
  Flickgame
Flickgame is a game-/story-/thing-making tool. You have sixteen frames, sixteen colors, a few brush sizes, and the means to link together frames via the color menu.
  LayaAir
LayaAir is a web-based game engine targetting mobile and web platforms, with integration to the metaverse Layaverse.
  Microsoft MakeCode
A free online learn-to-code platform where anyone can build games, code devices, and mod Minecraft
  Octo
A high-level assembler for the Chip8 virtual machine, complete with an environment for testing programs, and tools for sharing your creations
  Puzzlescript
An open-source HTML5 puzzle game engine