lindeman’s lectures: game design - academics |...

Lindeman’s Lectures:Game Design

(Part 1)

Robert W. LindemanAssistant Professor

Interactive Media & Game DevelopmentHuman Interaction in Virtual Environments (HIVE) Lab

Department of Computer ScienceWorcester Polytechnic Institute

[email protected]

R.W. Lindeman - WPI Dept. of Computer ScienceInteractive Media & Game Development

2

Five-Lecture Structure July 15

Introduction to Game Development

July 16 Game Design

July 23 Serious Games

July 29 Virtual Reality

July 30 Future Gaming (Natural Interaction, MMOs, Mobile)


3

Today’s OutlineWhat is Gaming?What Makes a Good Game?How Can we Make Good Games?


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Expected Outcomes ofthis Lecture SeriesUnderstanding of Game Development

Process Why is it hard? What types of people are involved? Why is it important?

Understanding application areas ofgames and interactive techniques

Motivation for future work by you!


5

Summary of Syllabus Lectures and in-class exercises

Exercises designed to drive home concepts, or toget you thinking about projects

Short Quizzes Short homework assignments Talking in class

Please ask questions!! I will too!!

Computers in class Please focus on class material Don’t read email, etc.


6

What is a Computer Game?User Perspective A goal (or set of goals)

Save the Princess (solve these puzzles first) Score points (get power ups) Finish first (unlock features)

A set of rules governing game play Turn taking, like RPGs Reaction to events, like Tetris' falling blocks Legal actions

Visual (audio, etc.) content Control techniques

Button mappings


7

What is a Computer Game?System Perspective A set of resources that are managed to support an

entertainment (usually) application Graphical (audio, etc.) rendering A user interface Script handling Event processing

Time, collisions, etc.

File I/O Asset-creation tools

Models, graphics, sound, etc.

Optional Networking AI


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Types of Games 2D (Tetris) Side-scroller 3D isometric 1st-person view 3rd-person view Others too


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Game Genres Genre defined:

A category of artistic composition, characterized bysimilarities in form, style, or subject matter.

First-person Shooter (FPS) Real-time Strategy (RTS) Action Sports Simulation Stealth Puzzler Party


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Elements of a 3D Game Game engine Scripting Graphical user interface Models Textures Sound Music Support infrastructure

Web site Support forums Admin tools Database


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Game Engine Scene graph

Representation of the world Includes characters

Timing is very important Events

Time-based Multi-player

Synchronization

Database of objects Networking

Between server and clients Between servers Between clients

Origin

Transform

Castle

Drawbridge Moat

TransformTransform

DragonPlayer


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Game Engine (cont.)Core utilitiesRendering systemPhysicsArtificial intelligenceInput management


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Core UtilitiesData structuresGame-state managementTimersMemory managementJournaling servicesFile loggingPerformance profiling toolsEncryption/decryption


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ScriptingScripting languages provide easier path to

building a game Provides access to game-world objects (GWOs) Allows most aspects of the game to be defined Tie all parts of the game together Leverage investment in engine development Trade control for automation

Sample scripting languages for games Lua (www.lua.org) Torque Script (www.garagegames.com)


15

Graphical User InterfaceProvides access to

Game menus (e.g., save, load, boss) Player status (e.g., health, current speed) Maps Non-Player Character (NPC) dialog Player-to-player chat


16

Models (Art Stuff)Objects are made from

Geometry (a.k.a., polygons) Lighting Textures

Vertices and connectivity Triangles Triangle-strips Meshes Patches/surfaces


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Texturing (Art Stuff)Created/manipulated using image

processing software Photoshop Paint Shop Pro

Mapped to geometry (models)Very powerful image enhancing

techniques Can be used for fake shadows, fake

reflections, much more


18

Sound and MusicOne of the most-important elements of

any experience is soundSound effects

Make things more (hyper-) realistic

Musical score Sets the mood Builds emotion

Speech outputVery important skill


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Support Infrastructure Front-end for running games

Steam

Web site Promotion, log-in, etc.

Support forums Cheats, hints, discussion of new ideas

Admin tools User maintenance Anti-cheating measures

Database Game-state maintenance


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Game-Development OutlineWhat is a Game?GenresThe Game-Development ProcessWhat Makes a Good Game?


21

What is a Game? (1 of 3)Movie?

No interaction, outcome fixed

Toy? No goal, but still fun! Players can develop own goals

Puzzle? strategy and outcome is the same each time

"A computer game is a software program in which one or moreplayers make decisions through the control of game objects

and resources, in pursuit of a goal."

Based on notes from Mark Overmars


22

What is a Game (2 of 3) A Computer Game is a Software Program

Not a board game or sports Consider: chess vs. soccer vs. Warcraft

Ask: What do you lose? What do you gain? Lose: 1) physical pieces, 2) social interaction Gain: 1) real-time, 2) more immersive, 3) more

complexity

A Computer Game involves Players Think about your audience; the game is not for you

but for them. Don’t just think about your story or the graphics or

the interface, but consider the players.



23

What is a Game (3 of 3) Playing a Game is About Making Decisions

Ex: what weapon to use, what resource to build Can be frustrating if decision does not matter Want good gameplay (major topic later)

Playing a Game is About Control Player wants to impact outcome Uncontrolled sequences can still happen, but should be

sparing and make logical

A Game Needs a Goal Ex: Defeat Ganandorf in Zelda Long games may have sub-goals Ex: recover Triforce first, then Sword of Power Without game goals, a player develops his/her own (a toy)



24

What a Game is Not (1 of 2) A bunch of cool features

Necessary, but not sufficient May even detract, if not careful, by concentrating on

features, not game

A lot of fancy graphics Games need graphics just as hit movie needs special

effects, but neither will save weak idea Game must work without fancy graphics Suggestion: Should be fun with simple objects

"When a designer is asked how his game is going to make adifference, I hope he … talks about gameplay, fun andcreativity – as opposed to an answer that simply focuses onhow good it looks." – Sid Meier (Civilizations, Railroad Tycoon, Pirates)



25

What a Game is Not (2 of 2) A series of puzzles

Most games have them, but they are not thegame

An intriguing story Good story encourages immersion, but will mean

little without good gameplay Example: Baldur's Gate is a linear story. Going wrong way gets you killed. Not interactive: interaction in world all leads to

same end.



26

Games are Not Everything Most important

Is it fun, compelling, engaging?

Computers are good at interactivity Allow for interactive fun

Examples: SimCity

Very compelling, but mostly no goals. More of toy than a game, but still fun.

Grim Fandango Good visuals, story, etc., but need to do puzzles to

proceed Could have skipped to just watch story Would still have been fun without the gameplay.



27

Game-Development OutlineWhat is a Game?Genres (next)The Game-Development ProcessWhat Makes a Good Game?


28

Game Types What are some types of games?

Arcade Games: Response time is key! Puzzle Games: Clever thinking is key! Role-Playing Games (RPGs): Character development Strategy Games: Real-time or Turn-based Adventure Games: Exploration First-Person Shooters (FPSs): Fast-paced action! Third-Person Action/Platformer: Action and puzzles Sports Games: Real-life made virtual! Racing Games: Arcade-style and realistic Simulators: Try for realism. Party Games: Social aspects (DDR, Guitar Hero) Educational games: Goal is learning.


29

What Games are Played?Console gamers:

Action (30%) Sports (20%) Racing (15%) RPG (10%) Fighting (5%) Family Ent. (5%) Shooters (5%)

The Entertainment Software Association (ESA)

PC gamers: Strategy (30%) Children's Ent. (15%) Shooters (15%) Family Ent. (10%) RPG (10%) Sports (5%) Racing (5%) Adventure (5%) Simulation (5%)


30

Game-Development OutlineWhat is a Game?GenresThe Game-Development Process (next)What Makes a Good Game?


31

Game DevelopmentTimeline (1 of 5) Inspiration

Getting the global idea of the game Duration: 1 month (for a professional game) People: lead designer, team discussion Result: treatment document, decision to

continue

Conceptualization Preparing the "complete" design of the game Duration: 3 months People: designer + prototype

programmers/artists Result: complete design document



32

Concept

Based on notes from Neal Robison, ATI

• Define game concept• Define core game features


33


Concept: Van Helsing (1 of 4)


34




35

Van HelsingPre-Production Video




36


Van HelsingFinished Concept Video



37

Game Development Timeline (2 of 5)Prototypes

Build prototypes as proof of concept• Can take 2-3 months (or more)• Typically done a few months after project start

In particular, used to test game play Throw prototype away afterwards

• Don't expect it to evolve into game!• The Pancake Principle (Fred Brooks)

“Plan to throw one away, you will anyway.”

Pitch to Publisher



38

Game Design Documents Vision Document Technical Design Document Artistic Design Document Together == "The Bibles"

Production budget & detailedschedule

Working prototype, with gamemechanics

Focus test Submit concept to Sony, etc.

Part of "pitch process"

Prototype or 1st Playable



39

PrototypeKey game prototype features:

Core gameplay mechanic Game engine / technological proficiency Artistic / styling guide Demonstration of control / camera system Example gameplay goals

Chapter 7.3, Introduction to Game Development


40


Prototype: Red Ninja (1 of 3)


41

Red NinjaPre-Production Video




42

Red NinjaFinal Production Video




43

Game Development Timeline (3 of 5) Blueprint

Separate the project into different tiers Duration: 2 months People: lead designer, software planner Result: several mini-specifications

Architecture Creating a technical design that specifies tools

and technology used Duration: 2 months People: project leader, software planner, lead

architect Result: full technical specification



44

Game Development Timeline (4 of 5) Tool building

Create a number of (preferably reusable) tools, like 3Dgraphics engine, level builder, or unit builder

Duration: 4 months People: project leader and 4 (tool) programmers Result: set of functional tools (maybe not yet feature

complete)

Assembly Create the game based on the design document using the

tools; update design document and tools as required(consulting the lead designer)

Duration: 12 months People: project leader, 4 programmers, 4 artists Result: the complete game software and toolset



45

Other Milestones:Alpha DefinitionAt Alpha stage, a game should:

Have all of the required features of thedesign implemented, but not necessarilyworking correctly

Be tested thoroughly by QA to eliminate anycritical gameplay flaws

Still likely contains a certain amount ofplaceholder assets


46


Alpha Definition Feature complete "Localization" begins Focus testPlay testingMarketing continues


47

Game Development Timeline (5 of 5) Level design

Create the levels for the game Duration: 4 months People: project leader, 3 level designers Result: finished game with all levels, in-game

tutorials, manuals

Review Testing the code, the gameplay, and the levels Duration: 3 months (partially overlapping level

design) People: 4 testers Result: the gold master



48

So, You Want to be a GameDesigner?Break into groups by favorite genreDecide on a game ideaThink about these aspects:

Who will be the main character? What will be the main actions of the

character? What will the setting be? Why is it fun? What are the goals? Who is your target audience? What platform(s) will they play on?

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