Got Insurgency running, a tad choppy and minor glitches, but very playable on my R7 250 gpu. I had to find a working launch options string by trial and error from the Proton web page.
Is that 1 or 2? Loved the first insurgency but the second didn't quite do it for me and I haven't played either in a long time
Dialed down shadow & texture detail and now it runs smooth as butter, maybe even better than on Win 7!