A fitting end to a great series, while maintaining it's great online play.
The story arc is wrapped up at last with a fun, if not overly short campaign mode with the voice acting and finish very satisfying despite the last two levels being rather...stodgy, for want of a better word. There are moments though that really take it to the next level- the air battle was great fun as was the 'Tsavo Highway' level.
The online play has been a key staple of the Halo series, if not the most important part. although there are a lot of undesirables to be found, it is organised well and still the most active and fun online experience money can get. The addition of forge and constant supply of new maps should only enhance this further later on.
All in all, Halo 3 is a great finish to the series- 10/10, for an outstanding game, but even more outstanding trilogy.