While not the first portable gaming systems, Nintendo's Game Boy was one of the first to reach massive audiences. It's library consists of hundreds of games, many of which are quick, simplistic but fun experiences designed both around the system's limitations and its purpose of gaming on the go.
So it's interesting that for this Top 20, there were several games that came in as "must owns" as out of 7 voters, four games made every voter's list, and eight made at least five lists.
And yet, the final results also showed the variety of the Game Boy, as only 14 games were on three or more lists.