Question about 'deathmatch' cvar

[Kobra]

First of all,I don't know if this is the right category for such question,I hope it is...been looking the whole forum and thought this is the most appropiate one.
So the question is,what's the deal with the cvar 'deathmatch 1/0' that some servers show in hlsw and monitorings? I tried myself to use amx_cvar deathmatch in the server console & server.cfg and it retrieves unknown command...

 

[Nordic Warrior]

Kobra, I think it's for HL1

 

[Kobra]

Kobra, I think it's for HL1

I've seen it on multiple cs 1.6 servers , look :

https://www.gametracker.com/search/cs/?search_by=server_variable&search_by2=deathmatch&query=1

 

[Nordic Warrior]

Kobra, in cs 1.6 gamedll or even in client dll a lot of cvars for HL, unused in cs

 

[Kobra]

Kobra, in cs 1.6 gamedll or even in client dll a lot of cvars for HL, unused in cs

Ok,so...is there anyone that knows how can I make this specific one visible? I'm interested because my server is csdm :) . I'm using latest rehlds/regamedll/reapi

 

[Limbooc]

создать квар на уровня плагина?
register_cvar("deathmatch","1",FCVAR_SERVER);

 

[Nordic Warrior]

Kobra, cvar description:

It defines if the server is multi player (1) or single player (0). When you launch a listen or dedicated server, this is auto set to 1. This only stay on 0 if you launch a map by map "mapname" or you play HL single player.