Game developers often create their own "engines" (rendering engines, physics engines). A developer might combine these concepts in code, yielding a backend process like a Factory.DieEngine or DieEngineFactory to handle program operations.

// Factory class public class DatabaseFactory public static DatabaseConnection createConnection(String databaseType) if (databaseType.equals("mysql")) return new MySQLConnection(); else if (databaseType.equals("oracle")) return new OracleConnection(); else throw new UnsupportedOperationException("Unsupported database type");