Ive never played AC4 so I dont know how difficulties are set out. On ace combat the hardest difficulty you start with is hard. Complete the game on hard and you unlock expert difficulty - one missile will kill while enemies take two. Beat expert and you get Ace. This is mostly Expert but with much harder AI.

Ive been playing since it came out and the Ace sqraudrons are really fun. ^^ Especially the last group. Btw, what ace sqaud did you fight first?

Too bad I cant play online.

Hope you enjoy it