About World Zero:
This game is a remaster/remake of Iron Storm. Though the graphics aren’t changed much. What is changed though is basically everything else. -you can now carry all weapons you find, yeah; but some weapons replace older weapons because they are basically upgraded weapons, like the automatic rocket launcher replaces the regular one and so on -the balancing is finally not messed up, in fact this is actually now a pretty easy game except a few sections which are bit hard and the Endboss which is new (but it sucks); better a bit too easy then way too hard and unfair -this game is way more linear, you always know where to go next, well generally there is only one way to go, I guess this is the only point which some people could dislike, but I really liked it, Iron Storm was often too confusing; because of the better balancing and this game beeing more linear you will need about half the time for Iron Storm which is still 3-4 hours for me, which is more than enough -sadly there are no quicksaves anymore, but you also don’t really need it unlike in Iron Storm; now you save at those terminals but they are usually not far away from each other so I don’t mind too much -the gunplay also feels much better -the devs also added the possibility to take control of some turrets in the last level, as well as taking control of a mortar like weapon once earlier in the game -the devs completly removed the melee weapon which isn’t a big deal at all So basically everything is improved and more polished. Go for this one and only play Iron Storm too if you are a big fan of those old shooters (but I wouldn’t call Iron Storm an old school fps though).
