Counter Strike Online Wiki

Thunderstorm is a Unique grade grenade in Counter-Strike Online.


A new grenade used during the Joseon Dynasty, a powerful grenade that you can set the fuse time using the wick's length.

  • Improved weapon performance when used by Yeong Shin and Lee Chang classes.
  • Adjust fuse time by clicking the RMB. Each click increases it by 1 second (up to 4 seconds).

Release date

  • South Korea: 6 February 2020
  • China & Taiwan/Hong Kong: 11 March 2020
  • CSN:S: 17 March 2020