Played on PC with ultra settings, well crysis 1 was open world and sandbox game that was set on a tropical island and it was made by the same studio that produced far cry 1. Fc2 (horrible, horrible game) was made by ubisoft, that's why I was extremely surprised to see how good fc3 turned out to be. It's like the first time ever they listened to the players and eliminated all the flaws found in their previous games.
Crafting potions and makings your inventory storage bigger seems unnecessary at times, but it's not really annoying or anything and you can skip it all together anyway (you can heal without potions)
There's lots of kill animations, melee kills are my favourite since I'm a stealthy type in games, you can finish almost every mission without even being seen, but nothing holds you back from just jumping into a village and burning it all to the ground with a flamethrower.