woot? what was it? o_O

Hey, may be anyone could help me. I earned nearly all of the achievements, but the last an i am unable to get is "Sturdy Airliner - Watch the airliner fly away". Does anyone know, in which mission it should pop and under which circumstances? I think it should be earned in Mission 19? Would be happy if anybody could help me out. (: Thanks in advance!!...

Just wondering if some of the achievements are bugged or not achievable or only obtainable with future content, i say this as i completed all 31 stages with all upgrades but didn't register the Good Freinds, Ship Shape, The Fleet achievements for the ships ingame. Also haven't even seen Hind, Frogfoot or Flanker's ingame at all so those 6 achievements won't also register so i found that's 9 achievements in total but don't know if that's just me or whether other's have found the same thing, great game thoug...

I only want to say thanks from all Linux users. It is a great version and a lot of fun.

I just bought Battle Group 2 and really like it so far. However, I was wondering if it is normal that the game progress is not saved when quitting the game. I tried 2 times and played as far as level 12. After quitting and restarting the game, all progress was gone. Is this how it's supposed to be? Also, I did not get any of the achievements, even though I should have (e.g., earn 10 stars). If it matters: I'm playing the Mac version of the game....