What is wrong in this sentence?

Question

"Them never had some frightening and important mission, like you have in this video game."

Answer 1

They never had a freightening and important mission, as you have in this video game.

Answer 2

They have never had some frightening and important missions, as in this video game.

Answer 3

You have never had as frightening or important a mission as you have in this video game.

OR

They have never had as frightening or important a mission as is had in this video game.

Answer 4

"They should never rely on Yahoo Answers to do their homework"