guys im playing at the normal level.....im thinkin bout trying the hardest level...can u tell me the biggest difference on hard level compared to normal level?
On the most part it's not very hard - you just have to be more careful.
I found that the parts that really matter are the big battles - nova prospekt's couple... the 2 gunships and turret setups. They take the most out of you... the rest isn't very hard. Just be smart.
You should play it all the way through o nthat skill though. It's great fun.
The Combine are a lot more of a challenge (though still, you cut them down by their hundreds), all enemies are tougher, you take more damage, health and armour stations give you lots less.