When was the "Adventure Island" game released?
when refers to release_year; the "Adventure Island" game refers to game_name = 'Adventure Island'
SELECT T3.release_year FROM game AS T1 INNER JOIN game_publisher AS T2 ON T1.id = T2.game_id INNER JOIN game_platform AS T3 ON T2.id = T3.game_publisher_id WHERE T1.game_name = 'Adventure Island'