Translation:How expensive this game is!
They accept sentences with the same structure as your translation in other places, but not here. Reported again on March 17, 2019.
This translation isn't even a good translation. Nobody would ever speak this way.
Can 游戏 be used to mean "videogame" as well or would it have to be 电游戏？I assumed it would be referring to a videogame but my answer was rejected
Yes, that can also be "video games" since the context of the sentence isn't clear to the type of games the author is referring to. If the vocabulary were to be thoroughly expressed i.e. 电子游戏, it's clear to the readers/listeners that the object is in fact "video games".