You'll need to join the table with itself to get the game list. If (as it looks) the thing that connects the game to the console is that the game's platform is set to the productname of the console, this should do it;
SELECT p1.productid, p1.productname, p1.manufacturer, COUNT(p2.productid) games
FROM productstbl p1
LEFT JOIN productstbl p2
ON p2.producttype = 'game' AND p2.platform = p1.productname
WHERE p1.producttype = 'Console'
GROUP BY p1.productid, p1.productname, p1.manufacturer;