How too..

[Tyrant]

How do you make it so You don't deal damage to yourself. From Grenades, rockets? Is this possible?

[own3r]

Not sure, but it is possible to have an brush entity which gives you hp or whatever you like every so many seconds, lets say every second.

[A1win]

function player_ondamage( player, damageInfo )

	-- Entity that is attacking
	local attacker = damageInfo:GetAttacker()

	-- If no attacker do nothing
	if not attacker then return end

	-- If attacker is a player do nothing
	if not IsPlayer(attacker) then return end
	
	local playerAttacker = CastToPlayer(attacker)
	
	-- If player is damaging self do nothing
	if player:GetId() == playerAttacker:GetId() then return end
	
end

[TheWetMule]

Now get quad working at the same time

[stino]

how too make it so your grenades only affect yourself? (usefull for concmaps)

[trepid_jon]

ff_waterpolo.lua has some invincible & quad damage shit going on if you want to reference it.