Give the number of games which were published by Ascaron Entertainment GmbH.
published by Ascaron Entertainment GmbH refers to publisher_name = 'Ascaron Entertainment GmbH'
SELECT COUNT(T2.game_id) FROM publisher AS T1 INNER JOIN game_publisher AS T2 ON T1.id = T2.publisher_id WHERE T1.publisher_name = 'Ascaron Entertainment GmbH'