There is an exploit that allows you to play the game on Recruit difficulty and still complete missions on Veteran.
Instructions:
- Mission select on recruit difficulty
- Play to the final checkpoint.
- Save and Quit.
- Mission select the same mission on Veteran
- Quit immediately upon loading
- Load the game and "Resume Game"
- You'll be at the last checkpoint, and on Veteran difficulty. Complete the mission.
Here is a video guide with English commentary!
Timestamps for final checkpoints:
00:35 - Team Player
02:25 - Cliffhanger
03:09 - No Russian
04:23 - Takedown
04:49 - Wolverines!
05:54 - The Hornet's Nest
07:43 - Exodus
08:56 - The Only Easy Day... Was Yesterday09:57 - The Gulag11:43 - Of Their Own Accord
12:21 - Contingency
13:37 - Second Sun
14:31 - Whiskey Hotel
16:16 - Loose Ends
16:59 - The Enemy of My Enemy
17:40 - Just Like Old Times
17:55 - Endgame
Here is a playlist of guides for this game!
https://www.youtube.com/playlist?list=PL-HeW6XkKdUK97oYVSMU7...