Can't help but recommend this game. Yes it's old like other people have said but it's graphics were setup in way so they don't age. Wonderfull 2D sprites in a amazing easy on the eyes 3D world. I've actual played this game since late Alpha, early Beta, about the 1999-2000 time frame. And I still play to this day, though mainly on the classic server.
Beside the easy on the eye graphics another amazing feature is the customization you can do with your character's stats and skills. Unlike nearly every other game on the market you stats matter. Your character's ablity will change massively based on what stats you take.
Want a Swordsman that dodges attacks and hits faster instead of just taking hits and having high hit points ? Put points in to Agility instead of Vitality. This means you trade High Hitpoints and high defense for High Flee (dodge) and high Attack speed. You then could go on to make a Agility based knight or Crusader with your swordsman. Or go the middle of the ground and do a hybrid of Agility and Vitality, You might not dodge as well as pure agility or have as much hitpoints and put Vitality but you can take less damage per hits then agility based characters, and dodge more then pure vitality.
And this is just the start of it, You can go pure support acolyte forgoing increased melee damage for the ability to heal massive amounts of damage, or for a true acolyte and have a mix of Melee damage and Healing ability.
Want a Mage that beats things as well as toss magic at them? Put points into Strength, Vitality, and Agility, instead of going pure intelligence. You lose magic damage but can dodge, take hits, and do better melee damage then a pure magic caster. Go the sage route and get the skills that let you move while casting and add the chance to auto cast a low level bolt spell while your hitting monsters.
Like making money, while beating on things with axes, swords or maces? Go a Merchant class character. They don't have the Melee skills of other classes but you can care more loot or heal potions items then any other class, can buy cheaper and sell for more then any other classes, have access to a cart to carry even more loot/potions, and use your fortune to pay the god of the merchants to attack your enemies (Mammonite skill). Want to craft potions or weapons, take your Merchant to ether Alchemist or Blacksmith. And even Blacksmith and Alchemist have the ability to go Pure Battle, pure Crafting, or a Middle ground, not building items as well as their pure counter parts but still being able to fight for themselves.
And there are many other classes to chose from like Archers, thief, TaeKwon Kid, Ninja, Gunslinger ans Super Novice. On top of all that it's free to play, with subscription players (only 7 bucks a month) only get 50% more experience and loot drops, larger storage and other minor abilities. I've spent most of my time since it's gone free to play not using a subscription (they call it VIP) and had no problems with it. So give it a try, nothing to lose but a lot of your free time, and a lot of fun to be had.