Ch.Free (IGN: Ch.Free??) is currently the top player in O2Jam KR. As of March 16, 2008, his EXP is 18,940,225. He is known for achieving a full combo in Earth Quake, which is currently one of the hardest songs in O2Jam.
Many have idolized Ch.Free and imitated the first 2 letters.
- [CH.Naru]Asia - the previous forum name of Asia imitating Ch.Naru
- ChLibre - an O2Jammer in the Philippines, famous for cheating
The first 2 letters CH means Chohon used by the Chohon family
- ::: O2Jam - 신나는 음악게임 오투잼 Top 1000 O2Jammers (Korean)