One game I thought always got sadly neglected was Zero sight by Shard workshop and its addon, extended operations.
Want a detailed flight sim with random weather, lots of missions to do, including random tasks, the chance to completely customize your plane as well as take on enemies in genuinely challenging combat?
its even got a random mission mode too. Maybe its because the games are genuinely challenging, indeed you'll crash at take off and landing a good few times before getting everything right, though that just increases the satisfaction when you do see your enemies go boom!
I played both Zero sight and its addon quite a bit back in 2012, but for some reason the games just fell off the map and everyone forgets about them, which is odd as they're still available, indeed I should install them on my Pc and give them another go.
they are available here
Enjoy!
Our souls with high music ringing; O men! It must ever be
That we dwell in our dreaming and singing, A little apart from ye. (Arthur O'Shaughnessy 1873.)