Genuinely a pretty cool and unique anti-war story but gamers are weird about it because apparently subversion and making the player do clearly bad things against their will is taboo :^(
That aside the main character has some great characterization, I especially like how his callouts become more and more insane throughout the game, it's a really nice attention to detail. The other characters are also very well handled but Mr. Walker is what really sold the game for me.
I won't defend the actual gunplay tho it's erm not good, very annoying at points.