Not wanting to sound too negative about it from the start, I'll just say: "It could've been a lot worst"...but in contrast: "It should have been a Hell of a lot better!"
NBA Unrivaled tried to take the game back to an arcade version of the sport itself, but failed miserably.
You can take part in a challenge game or go to Xbox Live. The challenge games are nothing more than a set list of NBA teams that you'll need to beat, yet there's no justification as to why they called it "Challenge Mode", hence the poor design.
Lag is ever-present in on-line play and the de-sync may cause glitches that will convince you to be a little more careful on spending your 10$. Disappointingly enough the actual "basketball" in the game is of low quality and the poor animation does not make up for it.
e standard game-play camera could use some fixes here and there and the lighting isn't very good either. Graphics? - The characters themselves look like cardboard cut-outs animated to look specifically like cardboard cut-out moving along the field: well done!
Balance is terrible, but I won't go into detail about it, since it's harder to explain than to play for yourself and see what I'm talking about, so to put it short : If your team has been scoring points in a row, the whole team gets a boost and helps you along, but if you've not been performing so well, the enemy AI has a higher chance of steeling your ball, thus condemning you to lose. I'd ignore the coach that just sits there and does nothing, but you won't keep your cool that long no to notice the scoring system sometimes cheats, awarding you 2 points for a 3 point throw.
There are 12 people on the leaderboards of NBA Unrivaled, so that's probably 10 more than the people who bought the game. That aside, no matter how much I want to find a + for this game, no self-respecting NBA or basketball fan in general should do the same mistake I did...Don't waste your 10 $ guys ; put a little extra and buy yourself a real basketball...bub.