Eight Rules For Making Your First Great GameNick Prühs

About Me

“Best Bachelor“ Computer ScienceKiel University, 2009

Master GamesHamburg University of AppliedSciences, 2011

Lead ProgrammerDaedalic Entertainment, 2011-2012

Co-Founderslash games, 2013-2016

Technical DirectorDaedalic Entertainment, 2016

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Diversity of Games

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Diversity of Games

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Diversity of Games

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Diversity of Games

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Diversity of Games

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Diversity of Games

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Game Development

“Games are insanely complex.”

- Warren Spector

Rule 1

Make testing as easy as possible!

Make testing easy!

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At the beginning of Campus Buddies, Christian had the idea of creating

a debug web page containing links for several debug functions

creating and logging in a test user

adding points for the current user

unlocking achievements

and many, many more

Make testing easy!

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Make testing easy!

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This was arguably the best idea we had throughout the project.

Make testing easy!

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• Debugging can be a pain in the ass

especially when network communication is involved

• Our debug page saved us lots of blood, sweat and tears

• The earlier you set up your debugging tools, the more you’ll benefit

from them

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Rule 2

Deploy often!

Deploy often!

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Creating a new version can involve a step or two:

Accessing source controlo Syncing working copy

o Creating tags

Writing version numbers

Performing the actual build

Packaging the build result

Publishing the game on a build page

Running unit tests

Sending email notifications

Deploy often!

You wouldn’t wanna do all that by hand.

Every time.

Do you?

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Deploy often!

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Rule 3

Use a bullet-proof, feature-based

project structure!

Bad Example

• Assets

EMHQo Data

– Icons

– Images

– Sprites

– Textures

o Resources– Icons

o UI– Common

» Sprites

EMHQ_gfx_exporto Textures

GUIo Assets

– Images

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Bad Example

• Assets

EMHQo Data

– Icons

– Images

– Sprites

– Textures

o Resources– Icons

o UI– Common

» Sprites

EMHQ_gfx_exporto Textures

GUIo Assets

– Images

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Bonus Objective:

- Find the icon for the Main Menu button.

Bad Example

• Assets

EMHQo Data

– Icons

– Images

– Sprites

– Textures

o Resources– Icons

o UI– Common

» Sprites

– Base» HUD

• Sprites EMHQ_gfx_export

o Textures

GUIo Assets

– Images

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Bonus Objective:

- Find the icon for the Main Menu button.

Feature Folders

• Project Root

FingerGestures

FreudBot

HOTween

NGUI

NData

Unity Test Tools

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Feature Folders

• Project Root

FingerGestures

FreudBoto Animations

o Atlases

o Fonts

o Localization

o Prefabs

o Scenes

o Sounds

o Sprites

o Scripts

HOTween

NGUI

NData

Unity Test Tools

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Feature Folders

• Project Root

FreudBoto Scripts

– Ads

– Analytics

– Comics

– Core

– Debug

– Dialogue

– IAP

– Mobile

– Progression

– Sound

– UI

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Feature Folders

• Project Root

FreudBot

o Scripts

– Ads» Components

» Events

» Systems

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Feature Folders

This way, features and plugins can easily be updated

or removed without having to scan the full project

tree.

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Rule 4

Listen to your players!

Analytics

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Analytics

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Analytics

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This is okay. (Endboss)

Analytics

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This is not. (Intermediate level)

Rule 5

Fix bugs immediately!

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Why you should always start debugging immediately

Why you should always start debugging immediately

• Code entropy says your code will get worse, all the time, unless you

actively invest in preventing that

• Broken windows theory says the worse your code is, the worse it will

become

• Tracking down bugs is harder in a larger code base

• Tracking down bugs is harder in a buggy code base

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Code Quality Tools

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Code Quality Tools

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Code Quality Tools

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/// <summary>

/// Attaches the passed component to the entity with the specified id.

/// Note that this manager does not check whether the specified id is valid.

/// </summary>

/// <exception cref="ArgumentNullException">

/// Passed component is null.

/// </exception>

/// <exception cref="InvalidOperationException">

/// There is already a component of the same type attached.

/// </exception>

public void AddComponent(int entityId, IEntityComponent component)

{

if (component == null)

{

throw new ArgumentNullException("component");

}

if (this.components.ContainsKey(entityId))

{

throw new InvalidOperationException(

"There is already a component of type " + component.GetType() + " attached to entity with id "

+ entityId + ".");

}

this.components.Add(entityId, component);

this.OnComponentAdded(entityId, component);

}

Divide-and-conquer

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Divide-and-conquer

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Divide-and-conquer

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Divide-and-conquer

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Divide-and-conquer

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Divide-and-conquer

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Logging

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On-Screen

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Pair Programming

48 / 12Source: University of Utah, UIT

And if nothings helps …

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And if nothings helps …

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Try again tomorrow!

Some are really nasty …

• Remote systems

• Race conditions

• Mobile development, embedded systems, drivers

• “Release Mode only” bugs

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Quoting My Tutor

“If the bug is not where you expect it to be,

you better start looking for it where you’re not expecting it to be.”

- Hagen Peters

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You need a repro. Period.

How can you be sure you’ve fixed it?

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Rule 6

Gameplay first!

Gameplay First

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Erich Schaefer. Postmortem: Blizzard's Diablo II. http://www.gamasutra.com/view/feature/131533/postmortem_blizzards

_diablo_ii.php

“First, we make the game playable as soon as possiblein the development process. Our initial priority was toget a guy moving around on the screen and hackingmonsters. This is what players would be doing most ofthe time, and it had to be fun.”

Rule 7

Learn from others!

Because you wouldn't use a screwdriver on a nail...

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StarCraft II Galaxy Editor

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StarCraft II Galaxy Editor

Because you wouldn't use a screwdriver on a nail...

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StarCraft II Galaxy Editor

Because you wouldn't use a screwdriver on a nail...

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StarCraft II MakeCombat

Because you wouldn't use a screwdriver on a nail...

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Erich Schaefer. Postmortem: Blizzard's Diablo II. http://www.gamasutra.com/view/feature/131533/postmortem_blizzards

_diablo_ii.php

“In many cases we created tools to speed up contentcreation, but then abandoned them. Too often, wedecided to keep using inferior tools because wethought we were almost done with the game, anddidn't want to take the time to improve them.Unfortunately, in most of these cases, we were notreally almost done with the game.“

Because you wouldn't use a screwdriver on a nail...

Genre Standards

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StarCraft II Screenshot

Genre Standards

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StarCraft II Screenshot

Genre Standards

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StarCraft II Screenshot

Genre Standards

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StarCraft II Screenshot

Genre Standards

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StarCraft II Screenshot

Genre Standards

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StarCraft II Screenshot

Genre Standards

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StarCraft II Screenshot

Genre Standards

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StarCraft II Screenshot

Genre Standards

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Unreal Tournament 3 Splash Screen

Genre Standards

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Unreal Tournament 3 Login Screen

Genre Standards

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Hostile Worlds Screen Transitions

Genre Standards

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Steam Server Browser

Genre Standards

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WarCraft III Lobby

Genre Standards

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WarCraft III Loading Screen

Genre Standards

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WarCraft III Score Screen

Genre Standards

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StarCraft II Options Screen

Open Game Sources

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Doom 3 GPL Release on GitHub

Open Game Sources

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Blizzard on GitHub

Open Game Sources

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Blizzard QT on GitHub

Open Game Sources

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Blizzard Premake on GitHub

Project Structure

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Windows 10 - System32 Folder

Project Structure

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> 3000 Libraries

Project Structure

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Hearthstone Asset Bundles

Project Structure

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Hearthstone Data Files

Project Structure

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StarCraft II “Mods”

Project Structure

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StarCraft Game Folder Size

Project Structure

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StarCraft MPQ Files

Data Structure

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https://en.wikipedia.org/wiki/MPQ

MPQ (Mo'PaQ, short for Mike O'Brien Pack, named after its creator[citation

needed]), is an archiving file format used in several of Blizzard Entertainment's games.MPQs used in Blizzard's games generally contain a game's data files, including graphics, sounds, and level data. The format's capabilities include compression, encryption, file segmentation, extensible file metadata, cryptographic signature and the ability to store multiple versions of the same file for internationalization and platform-specific differences. MPQ archives can use a variety of compression algorithms which may also be combined.

Data Structure

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Hearthstone Localization Files (GAMEPLAY.txt)

TAG TEXT COMMENT

GAMEPLAY_COIN_TOSS_LOSTYou get an extra card

GAMEPLAY_COIN_TOSS_WON You go first

GAMEPLAY_FATIGUE_TITLE Fatigue

GAMEPLAY_FATIGUE_TEXT Out of cards! Take {0} damage.

GAMEPLAY_FATIGUE_HISTORY_TEXT Trying to draw from an empty deck

deals increasing damage to your hero.

GAMEPLAY_END_TURN END TURN

GAMEPLAY_ENEMY_TURN ENEMY TURN

GAMEPLAY_YOUR_TURN Your Turn

GAMEPLAY_ERROR_PLAY_REJECTED Too late! Your turn is over.

GAMEPLAY_MOBILE_BATTLECRY_CANCELED Battlecry canceled.

GAMEPLAY_MANA_COUNTER {0}/{1} 0=unused mana 1=current total mana

Data Structure

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Hearthstone Data Files (BOARD.xml)

<?xml version="1.0" encoding="UTF-8"?><Dbf><Column name="ID" type="Int" /><Column name="NOTE_DESC" type="String" /><Column name="PREFAB" type="AssetPath" /><Record><Field column="ID">1</Field><Field column="PREFAB">Assets/Game/Boards/STW/STW</Field><Field column="NOTE_DESC">Stormwind</Field></Record><Record><Field column="ID">2</Field><Field column="PREFAB">Assets/Game/Boards/ORG/ORG</Field><Field column="NOTE_DESC">Orgrimmar</Field></Record>

Log Files

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Hearthstone Log File

Platform assembly:

D:\Games\Hearthstone\Hearthstone_Data\Managed\ICSharpCode.SharpZipLib.dll (this

message is harmless)

Loading D:\Games\Hearthstone\Hearthstone_Data\Managed\ICSharpCode.SharpZipLib.dll

into Unity Child Domain

Platform assembly: D:\Games\Hearthstone\Hearthstone_Data\Managed\PlayMaker.dll

(this message is harmless)

Loading D:\Games\Hearthstone\Hearthstone_Data\Managed\PlayMaker.dll into Unity

Child Domain

Log Files

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League of Legends Log File

Function: Spell::Effect::SpellFXRenderer::Update

Expression: false

001567.413| 0.0000kb| 0.0000kb added| ERROR| Assertion

failed!

File: E:/jenkins/workspace/game-code-Releases-4-18-public-

win32/code/Game/LoL/Spell/Effect/Client/SpellFXRenderer.cpp

Line: 854

Art Guides

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Development Blogs

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Post-Mortem of WarCraft

Developer Conferences

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Post-Mortem of Ochestrator

Rule 8

Commit to quality!

Commit To Quality

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Erich Schaefer. Postmortem: Blizzard's Diablo II. http://www.gamasutra.com/view/feature/131533/postmortem_blizzards

_diablo_ii.php

“The task of testing a game of Diablo II's scope, with itshuge degree of randomness and its nearly infinitecharacter skill and equipment paths, required aHerculean effort. […] Would a party of five Paladins,each using a different defensive aura, be untouchable?After more than 100 hours of play, is a fire-basedSorceress unable to continue in Hell Mode?”

Thank you for listening!

https://github.com/npruehs

@npruehs

nick.pruehs@daedalic.com