So for the longest of times I've been searching for a really old game I played as a kid.
I don't remember much, but it was a FPS, like a 'Return to castle Wolfenstein' kind of vibe. It was kind of spy/FPS/WW2 simple game in the 90's I think. You had to use guns, avoid mine fields, use subterfuge and guile. I don't remember much, but I had a lot of fun playing it and I can't find it on the net.
First level you started in the snowy region in front of a ramp where you need to infiltrate a Nazi camp to gather intelligence.
Another lvl you started in a cabin, and wolves were around the cabin you need to kill, and you needed to use a sniper to kill a guy in a moving vehicle. I think there was another lvl in a airport, and in another you needed to blow up a bridge before a train crosses it or something.
The last lvl you were on a ship and had to use ship's guns to bring down enemy planes. I think it was lvl 20, but I'm not sure. As I remember, in the end you realize you were fighting on the wrong side because enemy brainwashed you.
Sry for not remembering much else, but it was a long time ago. Hopefully someone played it and knows what its called.