An interactive fiction authoring tool online, that presents itself as an option between Twine and Inform. The interaction consists of drag-and-drop words on top of other words, rather than typing or choosing a hyperlink, which makes the results easily playable on a browser. It also allows integrating images into your game; the development focuses on writing, and provides easy menus to create conditional text – it is easy to use if you don’t feel comfortable programming. It’s all online, so your work is saved in your cache; the tool allows you to have a user account so that your work in saved on a server. A good fit for short games for mobile platforms.
Ink and Inky
Ink is the scripting language developed by Inkle Studios to write choice-based games, whereas Inky is the editor to create the text. It is a mark-up language, not very dissimilar from Choicescript above, although in order to release it as a game it needs Unity. So you still need to know how to use Unity in order to make a game. It’s open source.
Yarn – Dialogue Editor for Unity
A dialogue editor created as a tool for Night in the Woods as well as its companion games, the texts generated with it have to be exported to Unity. The developers acknowledge they are inspired by the Twine interface, and the program does import Twine files. Requires some programming chops to set up and connect to Unity.
A proprietary standalone dialogue mapping editor. The trial version can be used to prototype conversation trees. The paid version allows creating dialogue simulations including visual and audio assets, provides visualization tools of different branching, and even generates scripts for voice actors, which can also facilitate localization. Uses LUA as a programming language, and exports to a variety of formats that can then be plugged into your engine of choice (XML, JSON, RTF, PDF, JPEG, Excel). May be best for larger projects with a lot of dialogue and audiovisuals – and also developers who have an actual budget.
A visual novel engine that has been around since 2004, so that there is a large community of support as well as tutorials. Uses Python, one of the most accessible programming languages, it is also open source. One of its most attractive features is that it creates games that run both on desktop computers as well as mobile.
Adventure Game Studio (AGS)
A tool to make point-and-click adventure games. Initially created to make games in the style of the Sierra adventure games (e.g. King’s Quest), it expanded to other formats and allows developers to create their own style of adventure games. A classic tool that is now open source, counts with a good community and extensive resources developed over 20 years of its existence. On the downside, it is a Windows-only program, and requires special wrappers in order to release games for other program.
A proprietary tool to make Japanese-style role-playing games; it is pretty powerful and also has an extensive community because it has been around for a long time. The games use tile-based art, which facilitates both making visual assets as well as finding pre-made ones. It can also be used to make adventure games.
Adventure Creator for Unity
Another plug-in for Unity, also proprietary. It is a toolkit to make both 2D and 3D point-and-click adventure games. It uses visual scripting, which is a bit more accessible to non-programmers, and comes with a collection of pre-set templates to create inventories, branching dialogue, and object interactions. There is a growing community of developers.
- Elm Narrative Engine http://elmnarrativeengine.com
Update 25 January 2018: Started section on experimental tools and included a couple of links that I received over email. Thanks to Jeff and Daniel for sending me their engines!