Another way of saying don't blame me; this is how the system works.

Ex 1:
If the game is forced on the individuals required to "play" it... Such as war or an area in conflict etc. Using tactics to win or survive may not always be fair or morally right. In this instance, hating the player is useless and the quotes logic seems to ring true. This also covers situations where the rules say you can do certain things, the rules are followed and the other players just don't like that you are able or competent at taking advantage of and succeeding at the game.
However...
Ex 2:
If the game is not forced, there is no situation requiring life threatening survival choices or there was not agreement to start a game with certain parameters .. This saying is used to absolve someone of the act of wrong doing to another by convincing either or both the perpetrator and victim that there was no other choice. Fairness, rules , laws and social norms seem to get lumped into this version of the definition and it's implied that the victim is wrong for holding the perpetrator responsible for their actions. More specifically, calling life a game and using this quote to avoid responsibility for being unfair, deceitful or cheating on purpose and existing outside laws, rules and social norms.

Something a cunt says to justify cunty behavior.

If someone (the player) is good at something (the game), don't hate them for it, hate the thing they are good at, because you arent good at or even in the game.

The word player used in this sentence can be confused with the sexual definition of a player.

Originating from lyrics in Ice-T's song "Don't Hate the Playa", it was taken as a motto by the Pick-Up/Seduction community as a way of saying "don't hate the guy who's using seduction technics, hate the system that made him do it".

It is both a justification and critic of the men-women social (and some would say biological) dynamics, that entices men (and sometimes women) learning and using highly elaborate methods, sometimes seen as manipulation or social engineering technics, for the main purpose of seducing a women (or man).

It is often justified as a mean to one's end by the argument that "women are wired either biologically or socially such a way that, you HAVE to follow or use particular steps or methods, either naturally or by learning them, in order to seduce a women". Some people going further argument that "women have no choice in the way their brain and emotion are biologically wired, meaning they have no choice in the way they respond to men and seduction, so men have sometimes no choice but to apply these seductions methods of which the practice is called The Game".

Don't be mad at someone/something because they weren't the one that made you upset or hurt in the first place.
Ex. somebody cheating on someone, somebody losing a basketball game, etc.

1. A simple excuse for anything.
2. Also coined in rap, drop hate on anything but other rappers.

First of all the other definitions of this are pretty much bullshit. Women can just as much have sex with lots of guys by using the same phrase. First thing you do if you have problems in relationship: Talk about and search for the mistake in you first, not at your partner...
No politician ever used this sentence to justify war.

This simply means you shouldn´t focus your hate on the guy who did something but rather on the system that gave him the opportunity to do so. Guy gets lots of money by being a ruthless banker? Stop trying to change or hate him. You should rather try to change the system that is giving him the chance to do so.

Same as people causing wars for religious purposes a.k.a getting justification for doing one's own ideals and mostly wrong thigs.