Rather the first one, perfect/present (
cum ludis, morieris seems really weird to me.).
Cum Temporal
Cum, "whenever", takes the construction of a relative clause in a general condition (see § 542).
For present time, either the Present or the Perfect Indicative is used; for past time, regularly the Pluperfect Indicative.
For est cum etc., see § 535. a. N.3.
And with
quis rather than
tu, for the "you" is impersonal in English, and for the reasons you yourself previously stated (the same person can't die several times).
So I still think that the best one is*:
Cum quis ludo thronorum/soliorum lusit, aut vincit aut moritur OR*
this is the good one ---> with present in the first part as well
, which brings us back to one of my first versions:
cum quis ludo thronorum/soliorum ludit, aut vincit aut moritur. On second thought I wonder whether it isn't even better than the version with perfect in the first part. Because
you can die during the game, before the game is completed. I don't know where you get the idea from that you can't die while playing...
Yes, the more I think about it, the more I tell myself that this is definitely the good one:
cum quis ludo thronorum/soliorum ludit, aut vincit aut moritur.
Simply... What people say about the first impression (that it' the good one) is sometimes right!
The version with perfect in the first part would only be right if we wanted to say that you will either win or die when the game is completed, when you have played it from beginning to end, and are no longer playing. Which doesn't quite make sense, because, logically, you can die anytime during the game (unless there is some kind of magic that makes so that you can only die when it is over.)