What do you search in a combat flight sim?

[robtek]

Beside the as real as possible FM, DM and CEM, believable sourroundings and as much little detail as can be inserted without endangering fluid playing, i'd like to see changing weather.

To go on a mission with 6/8 cloud cover, maybe finding the clear weather over the target, just to come back low on fuel, having to land in a rainstorm with gusty wind, after finding your base under the now closed cloud cover with the base at 1000ft.