When comparing Corona SDK vs RPG Toolkit, the Slant community recommends Corona SDK for most people. In the question“What are the best 100% free and easy game engines for beginners?” Corona SDK is ranked 3rd while RPG Toolkit is ranked 60th.
Ranked in these QuestionsQuestion Ranking
Pro Very simple to use
Corona SDK is completely free as of March 2, 2015. That includes pro-tier plugins.
Pro Lua syntax
Uses the great and easy-to-learn Lua programming language.
Pro Amazing learning curve
Corona does not throw photoshop-like madness full of buttons editor. You can go as fast as you want, learning and building game from ground up. Eventually, you'll learn how much corona is doing for you. But to start you don't have to master complex editor software. It's a great tool to learn to start game development if you want to learn how to program and make games. Your experience will be 100% transferable to any other Pro game engine.
Pro Corona Simulator
Corona SDK ships with Corona Simulator, which runs your game/app directly on your PC/Mac and updates every time you make changes.
It provides immediate feedback to your actions, you can see your changes right on the screen, without necessity to make build to device. Getting instant feedback really boosts tenfold prototyping and development speed.
Pro Good documentation and lots of tutorials
Pro Cross-platform desktop and mobile
Corona works on OS X, Windows and Android (including Kindle Fire & Nook).
Pro Great community
Pro Ability to call any native (C/C++/Obj-C/Java) library
Pro Very comprehensive API
It's very quick to get things up and running with Corona SDK. The API is extensive and while it's not 100% feature-complete with the iOS API, it's close enough that you could create tons of games and never run into a roadblock.
The API docs can be found here.
Pro Content scaling
It's easy to create a game that looks good on many different sized mobile devices.
Pro Live builds - update builds running on a device automatically
With the live build feature, once you have created a build and installed on a device, you get lightning fast turnaround times because any change on the code or data is updated to the devices running the game (within the local WiFi) immediately. So changes can be tested on the real hardware within a very few seconds.
What's even more impressive, this even works flawless with multiple devices running the game. You have to use it to learn how good of a feature this is while development and even more, while doing QA. Imagine fixing bugs and everyone of your QA team/friends/whoever helps to get your game done, has all changes on his device without doing anything but waiting 5 seconds - outstanding.
Pro Well supported
Pro Object oriented scripting language
The scripting language RPG Code allows you to create robust games that don’t have to be an RPG.
Pro Tile Based Lighting
Want to create cool scenes complete with light sources? This engine give tile based lighting to enhance the mood for your RPG epic!
Pro Supports Plugins
Want to expand upon the editor without having to recompile it? RPG Toolkit allows for plugins to create the tools you need.
Pro Comes with it’s own code editor
Many times engines with their own scripting language make you stay in a less than helpful text editor. RPG Toolkit comes with it’s own editor along with code completion.
Pro Database of objects
Quickly change stats, graphics, and properties of every game object in your game.
Pro Orthographic and Isometric tiles supported
Straight on or at an angle? It’s up to you with the RPG Toolkit!
Pro Vector based collisions and pathfinding
Create vectors right in the scene to define NPC paths, colliders, and program triggers.
Pro Built in tutorial
Find out all of the features of RPG Toolkit from within the Toolkit itself! Giving you a guided tour to produce a simple scene to get moving with your own development.
Pro Free and Opensource
Get the freedom you want with the BSD and GNU license so you can touch every single aspect of this engine.
Con Making a device build requires internet connection
To build your app for the device (iOS/Android/AppleTV) Corona requires to fetch resources from online. This would include base application template and plugins. This allows not to perform local build or use Xcode or Android Studio to do a build. Even Large games/apps would build very fast with good internet connection.
Your code never leaves computed. Corona SDK would transfer some information to determine which plugins and pieces has to be transferred in order to make a final steps in build.
As a bonus - you get basically one button press to get from your Corona Simulator game to game on a device.
Con Closed source
Since you don't have access to the code, you can't make changes to the SDK. You even have to implement workarounds on issues that have long been reported, but never fixed.
Con Free, but not completely
Such conventional plugins as a reference to AdMob for example, cost $300 per year!
Con Default menu/fighting systems cause build errors
If you open up a new game and check the checkbox that copies the default assets it will create an error due to the default Battle System. You will have to create your own Battle System to get around this.
Con Windows only
There are so many devices and operating systems out there now that it doesn’t make sense to only support windows anymore.
Con Cumbersome workflow
Often the window you need is buried in another window which does not completely make sense. A UX update is definitely needed with this engine.
Make sure to save often since things can be a bit buggy.