Parachute function when you keep pressed E on the air.

CounterStrikeSharp

Drag and drop from releases to game/csgo/addons/counterstrikesharp/plugins

Configure the file parachute.json generated on addons/counterstrikesharp/configs/plugins/Parachute

{
  "Enabled": true,
  "DecreaseVec": 50,
  "Linear": true,
  "FallSpeed": 100,
  "AccessFlag": "@css/vip",
  "ConfigVersion": 1
}

• Enable - Enable or disable the plugin.
• DecreaseVec - 0: dont use Realistic velocity-decrease - x: sets the velocity-decrease.
• Linear - 0: disables linear fallspeed - 1: enables it
• FallSpeed - speed of the fall when you use the parachute
• AccessFlag - access required for can use parachuse, leave blank "" for public access.

Take ideas from https://forums.alliedmods.net/showthread.php?p=580269 like add option for buy a parachute.