This is a direct follow-up to Pyramid, an excellent game in which you had to battle through a long succession of rooms each containing different aliens.
Doomsday Castle features the same hero Ziggy complete with his trusty
shielded space module. And once again you have to make your way through
many rooms and passages on a quest of daunting complexity.
You're searching for six ancient stones which you need to escape from
the castle. They're located somewhere in a huge labyrinth of 25 halls and 49 passages.
It would literally take hours to work your way right through the castle because you have to shoot your way out of each hall in a complicated way which requires destroying huge numbers of alien Urks as well.
But will you have the tenacity to keep at it? Unlike Pyramid, this game is not particularly compelling, because although there are plenty of different types of Urk, the action in each hall is basically the same.
But I must admit that the climax, if anyone ever gets there, sounds pretty exciting. Apparently anyone finding and entering the exit chamber with all six stones would spark off a chain reaction which leaves him just a few seconds to escape.
But I'm not prepared to invest several months in nondescript action for the sake of a few seconds thrill.