env_shake
env_shake is a point entity available in all 
GoldSrc games. it shakes the screens of players for some duration.
Key Values
Targetname:
- Name
(targetname)<targetname> - The targetname that other entities refer to this entity by.
- Amplitude (0-16)
(amplitude)<string> - How far away from the normal position the camera will wobble. Should be a range between 0 and 16.
- Effect Radius
(radius)<string> - The radius around this entity in which to affect players.
- Duration (seconds)
(duration)<string> - The length of time in which to shake the player's screens.
- 0.1 = jerk, 255.0 = rumble
(frequency)<string> - How many times per second to change the direction of the camera wobble. 40 is generally enough; values higher are hardly distinguishable.
Flags
- [
1] : GlobalShake
