For HONOR!
Honor is a big part of Cabal Online, because honor ranks can have a significant impact on your character's stats. A player with a high honor rank gets a massive bonus to hit points, damage and all resistances. Players can gain honor by hunting monsters in special PvP zones and also by defeating enemy players in duels and PvP areas. Characters can lose honor just as fast as they gain it if they PK others or craft certain items. The most powerful craftable items usually require a large deal of honor to be sacrificed, so honor actually means a lot in Cabal. Plenty free MMORPGs usually incorporate some sort of PvP reward system, but no other game really rewards players as much as Cabal Online does for getting 'honor' and killing enemies in PvP zones.