GAME DEVELOPMENT WITH UNITY

Technical Design Document and Game Design Document

This tutorial will discuss about the technical design document and game design document to teach you how to narrate your technical features and elements that you will put in your game. This lesson will introduce you to a technical design document and an overall game design document along with the work involved in putting together the technical plans in creating the game.


Object-Oriented Design

Modern digital games can be considered as large software projects which run and are made up of thousands of lines of code to millions of lines of code. Object-Oriented Design (OOD) came into existence to deal with large software projects. The GDD or TDD are made keeping in mind all the demands of OOPs along with the implementation details (TDD for technical details and GDD for entire Game Details) within it.


Technical Design Document(TDD)

The Technical Design Document provides a blueprint for the software engineers in your team to implement and code the features of your game. The technical design document will let your developers to specify - what are the requirements, how they should be implemented, along with the tools and technologies required for the implementation. The connection between structural design of a Software and Technical Design Document is that the technical design document has a broader scope with less details, than a software architecture diagram.

A TDD generally contains the following information:

  1. List of all features.
  2. Choice of Game engine
  3. High level diagrams
  4. Details about the 3D objects, terrain, scenes.
  5. Use of Physics Engine
  6. Game logic and artificial intelligence
  7. Audio and Visual details and specifications
  8. Networking
  9. Delivery platform & hardware/software requirements for running the game on a system.

Here we have a very good TDD example (designed by some students for their college project): TDD Example


Game Design Document(GDD)

When anyone says that, "check in the design document", they basically refer to the Game Design Document (GDD). This document gives a detailed explanation of all of the game characters, the stages or levels, the game mechanics, the views and scenarios, the storyline, various menus and options implemented etc for the game.

Game Design Document


The game design document is part of a set of documents that specify the complete details about the game you are creating. All of these documents, are collectively called the production plan:

  • Concept or Vision Document (Proposal)
  • Artistic Design Document
  • Technical Design Document
  • Project Schedule
  • Software Testing Plan
  • Risk Mitigation Plan

The Game Design document can be internally divided into three sub-parts, where each part of the document describes a special phase of the game project. It describes the three development stages which are: from concept to design to production. These are:


Concept Document

The concept paper acts as a letter of proposal, where in the entire objective as well as the tools and human resource requirement is planned. This helps to set out our goals clearly (or the entire team) so that every one is on the same page.

It also acts as a sales tool for partners who will take the product to the market to sell and publicize. During this stage you can also start working with a mini-prototype which will give you an opportunity to experiment and revise your idea.

In this document information like: storyline narrative ,genre, target audience, most compelling feature, cost, time for development etc are specified.


Design Document

In this game design document, there involves an active on-going discussion amongst the artists, animators, sound engineers, and developers. These documents are very often used for clearing confusions by adding comments, and sharing ideas etc as well. The tools and softwarea that will be required for the designing and development of the game are also written with proper budgeting.

Design document is to make sure the end product is just like you expected it to be.


Production Document

This is the final stage of the Game design document, where the production management and developer's group work to create the final product. Mostly the game designers are outsourced for some specific game design purpose only. Whereas the game production team and game developers are purely-internal human resources of that company. This phase also keep a detail about the number of developers as well as the work assigned to them.

This document is full of Time management charts, task database, budget spreadsheets, technical specifications etc.


Here we have a very good GDD example (designed by some students for their college project): GDD Example