Provide the name of games released in 2015.
names of games refers to game_name; released in 2015 refers to release_year = 2015;
SELECT T3.game_name FROM game_platform AS T1 INNER JOIN game_publisher AS T2 ON T1.game_publisher_id = T2.id INNER JOIN game AS T3 ON T2.game_id = T3.id WHERE T1.release_year = 2015