The Gem bug or Gem hack is anything that may increment a player's Gems.


Ways to increment a player's Gems in O2Jam Philippines once involved the Previous button in the Item shop (removed), and, more recently, selling of the Evolution T-shirt (fixed). Hack programs have been reportedly noticed in Malaysia and the Philippines.


Possession of expensive instruments which are unattainable at their current level, e.g., White Cat, Mega Cyber, Phu Reel Streamer, Black Dragon, and Fish.