I expect any war game or film to be at least somewhat propaganda-ish, though some do it with more nuance than others.
My go-to example of an anti-war war game is Ace Combat. Despite having licensed planes from Lockheed, Grumman, Sukhoi and many other real life defense manufacturers, every single depiction of the wars in its games are negative. In fact, one of the most often cited criticisms of Ace Combat 5 is that it took the anti war message too far and became preachy.
This is the Ace Combat 04 between mission storyline, it’s twenty minutes and is a nuanced view of the war you fight in those missions, from the perspective of a young boy in a city occupied by the enemy.