Thread:ConTraZ VII/@comment-24853853-20140425065858

! The fastest way to obtain this medal is by playing Zombie Scenario mode and commit suicide using grenades after the round starts. The recommended map layout is Lost City (Hard), (Normal), (Easy), Trap, Culvert. The last map can be replaced by Double Gate (Hard) if Culvert isn't updated yet for your country. Remember: Do NOT use this tip in CSO SG/MY.
 * Biker Gang
 * Accumulate 100 times, playing with the maximum of 5 maps each time in Map Advancement to achieve the medal.
 * Patience is the key to success.

Note: Can be done alone.

In this it says not to use in CSO SG/MY because? Is it because that time we didn't have it yet? 