Thread:SecondOpinion/@comment-5688420-20200605042704/@comment-5688420-20200606081633

They're basically a label for Sega's early 3D games, particularly those that utilized the Lockheed Martin-engineered Model 1/2/3 arcade boards. Most Virtua titles (save for Virtua Racing and Virtua Tennis) were the first 3D titles of its genre.