Ink
- Pros: The workhorse of Inkle (makers of 80 Days, Heaven's Vault). Powerful choice-based system based around a highly elegant and readable text markup format. For example, authoring a choice is as simple as putting a * in front of each option. Can be embedded in Unity, but can also produce standalone html/javascript.
- Cons: No graph visualization. Official documentation is more concerned with embedded Ink than with standalone Javascript and doesn't cover style/images.
- Try it if: You want to make something choice-based but you're more comfortable using a text editor than a GUI.
- Check out: https://itch.io/jam/inkjam-2019/entries
- Get started: https://www.inklestudios.com/ink/