>>718124880
>It wasn't included in the bundle so it's the only one I don't have.
Fortunately, the game right is dirt cheap on key reseller sites
https://gg.deals/game/batman-arkham-origins/
Or you could get it on Humble Bundle for just 4 bucks
https://www.humblebundle.com/store/batman-arkham-origins

>I've been enjoying all the deep cuts of batman lore and finding out some of my favorite characters were introduced back in like the 40's is neat.
Then I think you may enjoy the "Cold, Cold Heart" DLC, since it's basically an origin story for Mr Freeze.
>Is Knight the one with Joker hallucinations?
Yup