"Escape to Salvation" - "Magnificent Retreat" [Campaign 4, Mission 4]

I maxed out Wolfenstein's level with the "Can Always Act" (CA) ability. I don't remember what the maximum level is. I just left the capital unguarded and waited for the enemy to capture it. Then I took it back. That's how I leveled up Wolfenstein. Otherwise, it's impossible to gain experience in the open field because the enemies immediately flee the battlefield.

Wolfenstein easily defeated the demons. The most difficult battle was against Kujin because in version 3.1, they fixed the ability to stop heroes.

I played through the campaign as a hero.