Duality vs TIC-80

The full source code is available on GitHub, where the framework is actively developed. All of the editor, core and plugin code is written in C#.

Duality includes a powerful visual editing system that can be used for previewing, integrating, editing and testing game content.

Because both Core and Editor are completely plugin-based, Duality not only incorporates a clean and modular design, but is also very extensible - even if it wasn't Open Source. In fact, most of the standard editing capabilities comes in form of Editor plugins.

It can be configured to serialize all data in a text-based format, which has been structurally optimized for version control systems.

It has been used in a production environment without burning the place to the ground. Supposedly artist-proof editor workflow with an API for tailoring the system to fit your team.

The app contains tools for coding, sprite editing, map editing, sfx and music editing.

Free version already includes most features but a paid version is available.

Pixelated Software with a good retro style.

Use awesome scripting languages like: Lua, Wren, Moonscript, JS, Ruby, etc.

Exports easily to Windows, Windows-XP, mac, Linux and HTML.

You can imagine this engine Shiva Lua scripting language making 2d side scrolling Megaman style games a Bandai trademark.