I finished and got 100% on Call of Duty 3 on PS2 (PCSX2).
It took me around 24 hours, but that's mostly because I left the game open sometimes. I actually finished the game twice because I wanted to get all the RetroAchievements.
I know a lot of people don’t really like this game, but honestly I enjoyed it a lot more than I expected.
There are some good missions, especially Black Baron where we control a tank. I also liked the characters and the weapons, I also like things related to WWII, like games, movies, or documentaries.
Sure, it has some bugs or parts that are impossible to do on hard mode.
I also want to check out the bonus materials and try the multiplayer someday.