Mobile Game Design Documents

A game design document (GDD) describes what a game is and how each part of it works, so artists, engineers and designers build the same thing. On a free-to-play game that keeps changing after launch, a document nobody updates is worse than no document at all.

Structure of a Living GDD

We write short, linked documents instead of one giant file. A typical doc set includes:

• A core document with the vision, target player and core loop
• One spec per system, with states, rules and edge cases
• Economy, progression and content tables kept as data, not prose

System Specs Mapped to Godot

Our documents follow the structure of the shared game framework we use for all of our games in Godot. Economy values, rewards and monetization rules are written in the same terms the code uses, so a spec maps cleanly onto what gets built. Each spec is short enough to read in one sitting and links to the others it depends on, which keeps reviews quick and changes easy to trace.

Design Documentation and Team Alignment

Good documentation means fewer meetings spent asking how something is supposed to work. Art, code and design work from the same descriptions and the same numbers, and new team members or partners get up to speed by reading. Because we keep a change log tied to builds, the docs stay a single source of truth long after the first version ships.

• Teams with scattered design notes — studios whose design lives in chat threads, slides and people's heads.
• Studios working with outside help — teams bringing in external art or engineering who need a clear brief.
• Games moving into production — projects leaving the prototype stage that now need specs for every system.

If your team keeps asking how something is supposed to work, let's talk about putting it on paper.