RaiderZ is a game that's worth checking out and sticking with, if you can ignore some inconsistencies.
Of course one of the first things a new player will notice in RaiderZ is it's combat system, a system that tries to break away from the usual "tab-targeting" systems, that World of Warcraft popularized. Instead, you preform combo moves with your character. You preform attacks with left mouse button and block with the right mouse, in addition you can dodge attacks for players and monsters with dodge moves (by default). Apart from these moves, the game has no classic targeting system instead you get a crosshair and you are to hit enemies with your own skill.
Monster Hunting Game - second most flashy ascept of RaiderZ is this - you catch big, scary monsters, and after you'd killed them you get mats from them which you can use to craft armor, weapons and other accessories. RaiderZ has no classic gear drops, instead all you get is mats which you use to craft your own gear. A great innovation no doubt, which looks great with RaiderZ graphics.
HOWEVER, the game has some "stupid" solutions. For a game that focuses on "hunting together", offer such a LOUSY social system that it makes you cry. Next, the game is not-so-open-world, you will encounter loading between zones, which appear very small. Guild creation system is really bad, and will turn down many players. There's only one class (and it's human), and character customization is lacking.
But if you can overlook these (minor) flaws, you are certainly going to enjoy this PvE focused game, which is one of the best MMOs in this field.