DoDamage
From the Scripting Manual
procedure DoDamage(ID: byte; Damage: integer); Parameter Info: ID (Byte): Player ID to do damage to. Damage (Integer): Amount of damage to do (4000 to get a definate kill) Description: This function will do damage to the specified player. NOTE: If you wish to be able to specify a player ID doing damage, use DoDamageBy.
Examples
begin
DoDamage(1,4000); //Instantly kill player 1 (Will appear as 'You killed yourself')
end;