il2 sturmovik

[Biggles]

http://www.mission4today.com/

there you go, on that site you can download many cool stuff, like campaigns, and skins etc. I'll link to some of my favourites:

http://mission4today.com/index.php?n...etails&id=1856
Campaign where you fly as a pilot of the Peruvian airforce.

http://www.mission4today.com/index.p...details&id=309
Campaign where you play as an english fighter pilot at Malta (Map:Okinawa)

http://www.mission4today.com/index.p...details&id=116
This one is very good. A campaign where you fly as an greek fighter pilot during the italian invasion, and then later the german invasion.