Insanely addictive.
There are 3 different types of game modes: Team Deathmatch, Solo Deathmatch, and Golem Wars. Team Deathmatch is a showdown between two teams. Solo Deathmatch is a free for all. Golem Wars is a mode that is unique to Rakion. Each team has a golem they have to protect. There's a Gold Golem in the middle of the map that a team member has to kill to get a Golden Sword. The Golden Sword isn't an actual thing, but it gives you the ability to attack the enemy golem. The golems attack back, but are very slow and miss most of their shots.
There are 5 different classes; Warrior, Archer, Blacksmith, Mage, and Ninja. Warriors and Blacksmiths bring up the brunt of the attack force. Archers are long range snipers while mages are group support and specialize in mass destruction and healing. Ninjas are stealthy mercenaries that creep up behind enemy lines and destroy them from the back. No one class has an unfair advantage over another. Each class has a short-range and a long-range weapons. Each has different moves and for different classes, one is better than another.
It's well worth the download, so go try it out.