I have this ERD created with Oracle's Data Modeler however I am unsure how to make the relationships between them

The rules as a business are that an account can own many games but not the multiple copies of the same game

An account can make many reviews on many games but not multiple reviews on the same game

I am unsure how this would work relationship wise. I do believe that there should be a many to many relationship somewhere but do not know how this would work on Oracles Data Base Modeler.

#id o display_name o email o country oipaddress o purchase_id #acc_id account_info account_purchases ogame_id opayment meth review_id purchase_id o account_id o o review #id ogame_name ogenre_name o publisher_name o platform reviews game