In 2010, how many PS3 games were released?
in 2010 refers to release_year = 2010; PS3 refers to platform_name = 'PS3';
SELECT COUNT(T3.game_id) 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 WHERE T1.platform_name = 'PS3' AND T2.release_year = 2010