Object-Oriented Design for Computer Games
Object-oriented design (OOD) is a foundational approach in game development that structures code around 'objects'—entities combining data and behaviors. This subtopic explores how OOD principles like encapsulation, inheritance, and polymorphism enable modular, reusable, and maintainable game systems. Learners will apply modelling techniques such as class diagrams and use cases to design game elements, bridging theory with practical game design.
Assessment criteria
Learning Objectives
What you need to know and understand
- Explain the benefits of object-oriented design in game development
- Identify and define key OOD elements: classes, objects, attributes, methods
- Describe the principles of encapsulation, inheritance, and polymorphism
- Interpret UML class diagrams and use case diagrams
- Construct a class diagram for a given game element
- Create a use case diagram to model interactions with a game element
- Apply OOD techniques to design a game element from a brief
Assessment Criteria
Key criteria assessors look for in your portfolio
- Correctly defines OOD and its relevance to game development
- Accurately identifies and describes OOD elements with examples
- Explains encapsulation, inheritance, and polymorphism with game-specific examples
- Produces UML diagrams that follow standard notation and are logically consistent
- Designs a game element that demonstrates appropriate use of OOD principles
- Provides clear documentation linking design decisions to OOD concepts
Assessment Guidance
Guidance for achieving higher grades
- 💡Practice drawing UML diagrams by hand to ensure neatness and correct notation
- 💡Use game examples you know well to illustrate OOD concepts
- 💡Always label relationships and multiplicities in class diagrams
- 💡For design tasks, start with a clear brief and list required objects before modelling
- 💡Review sample assessment materials to understand expected depth of explanation
Common Mistakes
Common errors to avoid in your coursework
- Confusing classes with objects (e.g., treating a specific character as a class)
- Omitting relationships (inheritance, association) in class diagrams
- Using incorrect UML notation (e.g., wrong arrow types)
- Overcomplicating designs with unnecessary inheritance hierarchies
- Failing to justify design choices in terms of OOD principles
Pass / Merit / Distinction Evidence Checklist
How your portfolio evidence is graded for PEARSON EDUCATION LTD Object-Oriented Design for Computer Games
Every vocational unit is marked against named criteria rather than an exam percentage. Your tutor's brief lists the exact codes for this unit — here is what each band is asking you to do.
Demonstrate baseline knowledge, accurate terminology, and core practical application.
Provide detailed analysis, structured explanations, and clear workplace reasoning.
Deliver thorough evaluation, original problem solving, and fully justified recommendations.
Coursework AI Review
Paste your assignment brief and check your draft against its P/M/D criteria
Key Terminology
Essential terms to know
- Purpose of OOD in games
- OOD elements: classes, objects, attributes, methods
- Encapsulation, inheritance, polymorphism
- Unified Modeling Language (UML) diagrams
- Use case and class modelling
- Designing game elements with OOD
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