List the platforms that release the most games each year.
platform refers to platform_id; the most games refers to max(count(game_publisher_id))
SELECT T1.platform_name FROM platform AS T1 INNER JOIN game_platform AS T2 ON T1.id = T2.platform_id INNER JOIN game_publisher AS T3 ON T2.game_publisher_id = T3.id GROUP BY T2.release_year, T1.platform_name ORDER BY COUNT(DISTINCT T3.game_id) DESC