One of the many hailed accomplishments of the game was that you could go through however you liked, as a murderous savage ninja, or a sneaky rat never getting caught. I've completed it with almost no kills (a couple of accidents I couldn't be bothered to restart for, plus this) and I want to now run through murdering like a boss.
How? It seems like the only way is to select each level individually. Is this how it was intended or is there some other "mode" I'm missing to play through again.
It feels a little like cheating to play through the early levels with all the gear gained from final levels. But I don't really want to delete saves, I'd prefer to play with the existing data intact.
Not platform dependant question, but I'm on PC