WOERO (Ragnarok Online) is:

Unlimited Items, Safe Refiner, Instant Level / Job, Guild Locations, PVP 24 / 7 / 365, Balanced PVP Mechanic, Tons of WoE features, Cute headgears, Without donations, Stable since 2012, Spectators, Proxy System, DDoS Protected, Without Lags, Equal conditions for all, Smooth game-play, Everyday WoE 26+4, Powerful guilds, Powerful players, Headgear Enchanter, WEB PVP / WOE Ranks, Restock System, Show Party Buffs, Awesome FPS performance at WOE

About WOERO in a few words:

Tournament Features
There is no monsters or leveling part. Pure PVP/WoE/BG. Take the items and create you build instantly from an NPC's in seconds after login to the game and join a battle in minutes.
Balanced Game
We have two separate game mechanics: for WoE and for PVP. All known exploits are already fixed. We have server-side delays against cheaters and abusers. WOERO balanced RO server.
Unlimited Battles
We have seasons when we host WOE between best international guilds from around the world. Btw, every day we have PVP at any time. Even Battlegrounds, and MVP Arena.