"Unique" could work here.
Edited to take out the first part of my statement, because individual is an adjective. I do not believe that it can be used here, though, in this context. I would not describe a game as "individual."
The Romanian sentence is actually trying to express that the game is one-player only (or, perhaps, just free-for-all).
Sounds awkward in English though. I see what you're saying, but...I'm sure there's a better word.
Individual absolutely is an adjective in English.
Understood. I've been corrected. But I still think that the sentence sounds very, very awkward.