Boring Campaign, Rubbish characters and a dreadful multiplayer.
Every Halo game has given me sense of happiness whilst playing them that no other game series has rivalled or even come close, But Halo Reach is an exception.
The campaign annoyed me with its rubbish characters who were not developed enough and that resulted in nobody caring about them when they died (bar Jorge maybe). The levels were completely unrelated to each other in parts, one level your here the next you're on the other side of Reach doing something completely different coupled with the fact that they are extremely repetitive in design constantly using buildings again and again with mountains in the background. The sights system is beyond annoying, it renders some weapons with a terrible aim leaving them unusable such as the assault rifle.
Multiplayer is a dreadful experience as it is impossible to kill anyone on certain game modes such as Slayer, you just stand there shooting each other until their shields are down, then you can actually kill them.
All in all, Reach is a huge disappointment; I don't know what got in to Bungie's heads to create this game but whatever it was I hope 343 industries don't carry it on for Halo 4.