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The World - Is HEAVILY instanced, you use the city as a central hub and you select missions/quests from the globe and go there to complete tasks. The largest 'area' I've been to so far looked absolutely beautiful, but there are invisible walls everywhere you go. The terrain is fantastic, but you only get to see roughly 10% of an area that looks like it would be fun as hell to explore out in the open. You can not swim (at least in the locations I've been to, it automatically forces your character to turn around.)
Combat - The combo system is pretty damn interesting and being able to change your class on the fly and at any given time is pretty great as well. It certainly helps to keep it fresh. I've been sticking with the paladin thus far and it's been fun, but the progression is a tidbit slow. Though to be fair I've only spent roughly 7-8 hours in game throughout the day. (I had a D&D game to go to!)
Cash Shop - Not in the game yet. There are a few MAJOR warning signs though that scare me, item enhancement stones being the major one from ranks 1-3. To upgrade your gear, it costs enhancement stones AND in-game currency. You'll be able to use the Argents as they are called, are the cash shop currency to trade in for in-game credits based on how it read.
Gear - When you pick up an item IT DOES NOT CHANGE THE WAY YOUR CHARACTER LOOOOOKS! It's very similar to The Secret World in that you unlock outfits by completing missions/quests and no doubt you'll be able to purchase them for the cash shop currency and in-game currency to farm.
WEEKLY LIMITS! There are WEEKLY limits on how many credits/ability points you can earn. I believe it's roughly 10,000 ability points and 60,000/600,000 credits (I can't remember which.) I guess this is to prevent grinding/gold bots. I'm not really sure.
INVENTORY - You can purchase inventory spots with in-game currency. That's pretty cool and it's relatively cheap. You can also use cash shop currency.
So as it stands right now the game has more or less stayed the same, I've gotten to a number of 'open' areas but keep in mind that these places are still not NEARLY as open or as expansive as one might expect from a true MMO. This game is very much like Vindictus or C9 in comparison when it comes to the missions. The large questing areas have zero side quests. You teleport into the area, there's generally a single NPC in front of you who either gives you basic lore/info or actually provides you with a quest. Beyond that as soon as you enter a location all of the quests in the area are shown in a list to the right side of your screen. Most quests continue to be: Kill these small groups of lifeless mobs in the fields who don't move, click on an item to get credit, kill things and pick something up, etc, etc. It's all very standard.
BOSS FIGHTS - They're starting to become tedious and drawn out. Most big bosses have x10 health bars and their mechanics rarely change throughout the fight. There are a few notable examples of the bosses getting one or two more skills as you tear through their health, but for the most part it starts to become obnoxious as you sit there and bash them again and again. (Especially as a paladin.)
Classes - Cryomancer, there's really no other reason to play the other two classes at this point. I'm the type of player who despises caster classes in all things RPG, I never play them. So with Paladin being my only melee option I went with that and stuck with it. I can kill things easily enough, but when switching to Cryomancer it becomes painfully obvious just how weak the paladin is. The Cryomancer does more damage, can slow targets and you can mostly find yourself kiting most moving boss fights. (There are a great number of bosses who like to sit in the middle of the room and not move, only spitting out mechanics at you.)
Character Progression - For most players who don't look up information on either the actual Skyforge website or some type of guide, few will ever figure out just how in-depth the system gets. Sadly that's probably going to hurt them badly. You have to go through and get your ultimate ability before unlocking the higher atlas tiers where you can start to try to go towards new classes, etc. It's a time investment. Not a huge one, but it's one that will probably take long enough that it will leave a bad, very narrow impression of character advancement on a lot of people. (It did with me at first, but I powered through it despite not really enjoying myself at the time. I'm still kind of there at this point.)
Combat - My wrist/fingers hurt. There's very little skill involved in the combo system, as you slash with your left click you'll find new skills open up on your right mouse button depending on how many clicks you've cycled through. One is an uppercut for the paladin, an AoE lightning strike and then a double-triple slash attack along with their executioner ability that you can use, their special AoE abilities and their 'ultimate' abilities. Dodge is also freaking useless as far as I can tell. Most projectiles/spells/melee hits still connect with you no matter what. There are only a few abilities that bosses do that dodge is useful with. Most of which are just 'get out of the fire' on the ground type mechanics. So don't go in expecting GW2 level stuff here.