Game_ cannot be resolved to a variable in arquillian persistance example - eclipse

Question

I was asking on #arquillian Freenode IRC channel about question
Arquillian JPA tutorial: Could not create new instance of class org.jboss.arquillian.test.impl.EventTestRunnerAdaptor
when a user told me that he successfully runned
https://github.com/arquillian/arquillian-examples/tree/master/arquillian-persistence-tutorial
so I did
git clone https://github.com/arquillian/arquillian-examples.git
then in Eclipse, I clicked File->Import->Existing Maven Projects and selecte the subdirectory
arquillian-examples/arquillian-persistence-tutorial
Once Eclipse finished importing the project, I obtain in file
/src/test/java/org/arquillian/example/GamePersistenceTest.java
line 146, the error message
Game_ cannot be resolved to a variable
What can I do? In my attempt at the link at beginning of the page, this did not happpen.
I did not change any file downloaded from git repo.
Folder tree
.
├── pom.xml
├── src
│   ├── main
│   │   ├── java
│   │   │   └── org
│   │   │   └── arquillian
│   │   │   └── example
│   │   │   └── Game.java
│   │   └── resources
│   │   └── META-INF
│   │   └── persistence.xml
│   └── test
│   ├── java
│   │   └── org
│   │   └── arquillian
│   │   └── example
│   │   └── GamePersistenceTest.java
│   ├── resources
│   │   ├── arquillian.launch
│   │   ├── arquillian.xml
│   │   └── jbossas-ds.xml
│   ├── resources-glassfish-embedded
│   │   ├── glassfish-resources.xml
│   │   ├── logging.properties
│   │   └── test-persistence.xml
│   ├── resources-glassfish-remote
│   │   └── test-persistence.xml
│   └── resources-jbossas-managed
│   └── test-persistence.xml
└── target
├── classes
│   ├── META-INF
│   │   ├── MANIFEST.MF
│   │   ├── maven
│   │   │   └── org.arquillian.example
│   │   │   └── arquillian-persistence-tutorial
│   │   │   ├── pom.properties
│   │   │   └── pom.xml
│   │   └── persistence.xml
│   └── org
│   └── arquillian
│   └── example
│   └── Game.class
└── test-classes
├── arquillian.launch
├── arquillian.xml
├── glassfish-resources.xml
├── jbossas-ds.xml
├── logging.properties
├── org
│   └── arquillian
│   └── example
│   └── GamePersistenceTest.class
└── test-persistence.xml
30 directories, 24 files

Answer 1

The _Game class in that example is generated by the Hibernate JPA 2 metamodel generator (hibernate-jpamodelgen) that is defined as a dependency in the project POM. You'll now need to generate the metamodel by employing one the options outlined in the metamodel generator reference guide.
You could use Eclipse itself by configuring the annotation processing phase. Or you could modify the POM to use the maven-compiler-plugin configuration specified in the guide, to run as part of your build.