Jelliz released a new SP mission for ArmA2 in the BI forums.

Quote Jelliz :
ey again!

Just made myself another mission today i thought i could share with the community


You play as a spetsnaz operative that has to sneak his way to Balota Airfield and shoot down a CDF chopper that is carrying troops to the front. If all the remaining CDF squads have been transported to the front, you lose. If you shoot it down, you have to get to the extraction point to win.