Jondob Games · JIS
Every interaction.Every kind of game.
JIS does all of it. Build any interaction you can think of using conditions and reactions that run in sequence or parallel. And it slots into your own game with no effort.
- A door that unlocks once the right thing happens
- Spawning enemies at the right moment
- A collectible that triggers a reward
- A cutscene that pauses at the right beat
- Music that swaps with the room
- A level transition that plays out on cue
- Routes that branch on a player’s choice
Every game’s list is different. Build yours.
Built to fit the game you’re already making.
Flexible, light, and out of your way. JIS gives you the pieces to compose any interaction.
Any game, on any platform
2D, 2.5D and 3D. A shooter, a strategy game, a roguelike deckbuilder, a quiet narrative game, any genre you can name. New project or one you’re deep in. JIS is flexible and light, so it won’t cost you performance, and it ships everywhere Godot does: desktop, mobile, console, and web.
An editor that’s actually fun
Want a new condition or flag? An animation on cue, a wave of enemies, a few explosions the moment a conversation ends? It’s all a few clicks away. Drag to reorder, pick from an organized reaction list, reach your flags in a tap, add as many as you want, and there’s more. Import your art, wire it up, and you’ve got something playable in minutes.
It works with your code, not against it
JIS does not try to take over your project. It works with what you’ve already built.
- Easy to extend and integrate: your reactions, your player controls, almost any system you already have.
- Hook it up to your player by extending one script.
- Write a reaction that activates, controls, or modifies your existing systems, also from a single script, and your code becomes part of the same flow and sequencing as everything else.
- It’s all just data. Every flag, every variable, every interaction is json, and one function call hands you the whole thing as a json string.
Fire it however you need
Walk into a zone, press a key, or call it straight from code. Point as many triggers as you like at one interaction.
An asset that keeps growing
Every update brings more. New reactions, new integrations with other tools. You buy JIS once, and every update after is free.
Author it right in the inspector.
No separate tool, no code for the basics. Build your interactions from conditions and reactions, and run them in parallel or in sequence, all in an easy-to-use inspector.
Demos to explore.
Six scenes that each show one idea end to end. Open any of them, read the setup, and take it apart.
Hello world
Walk up to the pedestal, press a key, and it fires back a message, a sound, and a burst of sparkles all at once. Your first interaction in a single scene.
A door that remembers
Interact to open it, interact again to close it. A single flag remembers which state it’s in.
Branching NPC
One NPC changes lines. ‘Help me find 5 cogs’ becomes ‘keep it up,’ then ‘you got them all,’ then a reward. One scene, different pages.
Cutscene zone
The camera zooms in on an angry Nem, lightning cracks, and the room goes up in smoke and fire. Walk into the flames and it reads ‘This is fine.’
Your own reaction
Touch the strange device and it rattles and flashes through random colors. When the built-ins run out, you write your own reaction, like this one.
A mini-game
Keep the Nems safe: batteries power a tower that shoots the attackers, buttons raise the bridge. A whole mini-game in one scene.
You are minutes from your first interaction.
Grab JIS, drop it into your project, place your first Interactable, and run a page. The getting started guide walks you through the rest.
Common questions.
What is JIS and what does it do?
JIS, the Jondob Interaction System, is a data driven interaction system for Godot 4. You place Interactables in your scene, give them Reactions to play, gate them with Conditions and fire them with Triggers, all authored in the inspector. It powers doors, chests, NPCs, cutscenes, quests and any other interaction your game needs.
How do I make doors, chests and NPC dialogue in Godot without a script per object?
One Interactable replaces the per object script. Give it Reactions from the built in library (animation, sound, movement, spawning, scene control and more), gate them with Conditions and pick a Trigger. For dialogue, JIS orchestrates the flow, which branch plays and when, while your own text UI or a dialogue addon renders it; asset integrations keep expanding over time.
Is there a no code interaction system for Godot 4?
JIS is authored in the Godot inspector with a custom editor. Reactions, conditions and triggers are configured, not coded. When you do need custom behavior, you extend a single class (JISReaction) and it shows up in the editor automatically.
Which Godot versions does JIS support?
JIS supports Godot 4.6 and newer. It is pure GDScript, so there are no native extensions to match to your engine build.
Can I add JIS to an existing project?
Yes. JIS is a self contained addon: drop the addons folder into your project, enable the plugin, and it works alongside your existing scenes and scripts without restructuring anything.
Does JIS work in 2D and 3D?
Yes. JIS supports 2D, 2.5D and 3D games with the same workflow. It is pure GDScript with zero external dependencies, so it runs on every platform Godot exports to.
How do interactions react to game state, like keys, switches or quest progress?
Every Interactable can hold multiple pages, and Conditions decide which page runs. A locked and an unlocked door are one Interactable with two pages. Reactions can update conditions as they run, so interactions drive each other.
Can reactions run in sequence or in parallel?
Both, in the same list. Each reaction has a wait mode (fire and continue, wait a fixed time, or wait until it finishes), so a single reaction list can mix parallel and sequential steps.
Does interaction state survive scene changes and save games?
State persists across scene changes by default. Across game runs, saving is in your hands: extract the current state as data, store it in your own save system, and load it back later. Nothing persists between runs unless you save it.
Does JIS work in multiplayer games?
Yes. JIS was built with ease of use in multiplayer in mind. You integrate it based on your game's networking and requirements, so you stay in control of what runs where, and it sits naturally next to JMB, our multiplayer backend for Godot.
Do updates cost extra, and what do they add?
No. JIS is a one time purchase with free updates forever, and it keeps growing: new reactions join the built in library over time, and integrations with popular assets are planned.
Can I use JIS in commercial games, and how does the license work?
Yes. JIS is royalty free and made for commercial games. The indie license is 50 USD and covers teams of up to 9 people. Teams of 10 or more need the pro license, 300 USD, which covers the entire studio. No royalties, no recurring fees.
What is the fastest way to learn JIS?
Six demo scenes ship with it (a hello world, a door, an NPC quest, a cutscene, a custom reaction and a mini game), and the getting started guide ends with a quick reference of the public API.
Where do I get help?
Start with the getting started guide. For anything else, ask in the Discord or email info@jondobgames.com. Support comes straight from the developer and is included with the purchase.
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