SELECT gname FROM Plays_games AS T1 JOIN Video_games AS T2 ON T1.gameid  =  T2.gameid GROUP BY T1.gameid ORDER BY sum(hours_played) DESC LIMIT 1
SELECT gname FROM Plays_games AS T1 JOIN Video_games AS T2 ON T1.gameid  =  T2.gameid GROUP BY T1.gameid ORDER BY sum(hours_played) DESC LIMIT 1 <table_name> : Video_Games col : GameID | GName | GType row 1 : 1 | RNG Stone | Collectible card game row 2 : 2 | The Vanishing of Eric Calder | Walking Simulator row 3 : 3 | Grand Term Assignment | Role-playing game row 4 : 4 | Europe is the Universe | Grand strategy row 5 : 5 | Call of Destiny | Frist-person shooter row 6 : 6 | Works of Widenius | Massively multiplayer online game <table_name> : Plays_Games col : StuID | GameID | Hours_Played row 1 : 1001 | 1 | 35 row 2 : 1001 | 2 | 15 row 3 : 1001 | 5 | 1 row 4 : 1007 | 4 | 1000 row 5 : 1008 | 5 | 50 row 6 : 1008 | 3 | 50 row 7 : 1010 | 6 | 1337 row 8 : 1032 | 1 | 47 row 9 : 1032 | 2 | 10 row 10 : 1032 | 3 | 100
col : GName row 1 : Works of Widenius