I've played GunZ for 5 years (yes, I'm a loser), and it always entertained me.  
This game is about fighting other people online. You could use swords, daggers, nades, guns; rockets, shotties, sprays, revolvers, pistols, ect, ect. There are styles like K-Style, D-Style, and others. 
  
K-Style 
  
bf-butterfly 
dbf-double butterfly 
tbf-triple butterfly 
hs-halfstep 
ss-slash shot 
rhs-reload halfstep 
rs-reload shot 
wall climb 
insta 
pinoy 
  
D-Style-I don't know much of this 
  
Yoyo 
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You can create clans for 1000 bounty (money) with names of your choice, unless already taken. 
  
There are different channels like; 
Free Channels 1-7 are for any levels 
Entry Channels 1 & 2 are for levels 1-5 
Beginner Channels 1 & 2 are for levels 6-10 
Veteran Channels 1 & 2 are for levels 11-20 
Expert Channels 1 & 2 are for levels 21-34 
Expert Channels 3 & 4 are for levels 35+ 
Elite Channels 1 & 2 (I don't remember what levels they are for) 
Champion Channels (I don't remember what levels they are for) 
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Ijji GunZ link