An interesting mix.
Like Constantinople, where the game is set, AC Revelations is a mixing pot of lots of different elements that comes together as something uniquely interesting.
A blend of the classic freerunning, stealth, & combat the series is known for, hidden tombs to explore, the mediterranean defense minigame which expands upon the assassin brotherhood mechanic from the last game, assassin den style tower defence, first-person puzzle Desmond memory sequences, and a further developed multiplayer.
Graphically this game looks as good as past iterations in the series, there aren't that many improvements to be seen, but there are moments which take inspiration from other recent games, and try to deliver a more cinematic feel to the gameplay.
This is the last game to star Ezio, however, the eponymous 'revelations', are for Altair, as you play through memories of his life. As for Desmond's story, there are plenty of threads still left hanging.
If you've enjoyed the other games in the series, and are looking for more of the same, this game will not disappoint.