When comparing Roblox vs ct.js, the Slant community recommends ct.js for most people. In the question“What are the best game engines for beginners and non-programmers?” ct.js is ranked 23rd while Roblox is ranked 24th. The most important reason people chose ct.js is:
ct.js is bundled with examples, docs, and easy to follow tutorials. Documentation and tutorials are available in a side panel on every screen.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Enjoy creating and playing your own game or thousands of other games available
You can create your own original game and play it, and have others play your game too. As of 2017, Roblox has over 500,000 game creators designing games. That's a lot of games made by players like you, so you'll never run out of options on what to play.
Pro Gives more flexibility when it comes to building
Since creations are not limited to cubes, you are given more choices. Players can fully customize the size of the blocks, and make wedges and hills that are not cube-like.
Pro The game is free to play
You'll be able to create your own games and play without paying for anything. Though they do have virtual currency that they call Robux, which you have to buy with real cash. You only have to do so if you want to upgrade the look of your avatar or get optional in-game power-ups. Like with most games, if you have the patience you can additional items over time, then you don't have to spend a dime.
Pro Offers a safe chat mode for kids under 13 and a parent's login
Since Roblox is used mostly by younger players, a primary concern for parents when it comes to interactive and multi-player online games have always been the safety of their children from online predators and inappropriate behavior. Roblox has this covered with their safe chat mode, and a parent can also monitor their child's activity and account settings.
Pro Beginner-friendly
ct.js is bundled with examples, docs, and easy to follow tutorials. Documentation and tutorials are available in a side panel on every screen.
Pro Skeletal animations with DragonBones support
You can import skeletal sprites and animations from DragonBones, which is also free. Skeletal animations are added to objects through code; developers can listen to marked events in animation, and ct.js automatically associates sounds in a DragonBones project with the game's assets.
Pro Good code editor
The built-in code editor comes with error checking, type checks, code completions accompanied with docs, multiple cursors support, and other modern features.
Pro Open source (MIT)
This means that no one will ever put any features behind a paywall and that you can reliably use ct.js in any projects without worrying about licensing. And you can hack on ct.js!
The repo is at https://github.com/ct-js/ct-js
Pro Tileset support
ct.js supports tiles in rooms, including collision checks and some extra editor tools, like bulk migration to a new tile layer or shifting by an exact value.
Pro WebGL and WebGL2 support
Starting with v1.0.0-next-1, you can now write WebGL games. WebGL support is based on Pixi.js.
Pro Modular approach
ct.js has a "Core" library that provides basic drawing functions, room and asset management, and mouse interactions. Any other functions are added to projects as "catmods", or simply modules. These modules can be enabled or disabled in one click, and can inject their code in different game loop stages, e.g. after drawing all the objects, leaving a room, or when a new object is created.
Pro Applicable to most genres
ct.js aims to be a general game engine and provides tools in making games of any genre.
Pro Dialogue and visual novel system with support for Yarn
A module ct.yarn allows developers to import a YarnSpinner project to create branching, data-driven dialogues and visual novels. An example is also bundled with ct.js.
The dialogue tree is made in a separate app, though.
Pro Real-time particle system editor
v1.3 brings a particle system editor, which displays a preview sprite for proper attachment of emitter to visual elements, and allows combining more than one emitter with different particles into one effect. With these, even the creation of complex, multi-step effects becomes easy. The editor comes with dozens ready-made textures for faster prototyping.
Cons
Con Tile editing is a chore
No live brushes with automatic corner drawing, no fills or rectangular/linear placement. All tiles should be placed by hand, with a "Shift" key to place multiple tiles at once. This will make you ragequit if you want to make sophisticated RPG scenes :D
Con Slower than native games
JavaScript and WebGL are fast, but they will always lose in performance if compared to native games, so it may be a bad choice for graphics-heavy games.