[Dr. Deleto]

cvar's are the game's control variables. They set all of the effects of the game up. Lots of cheats use edited cvar codes to work and lots of legit mods do as well. Its all in how you use them.

as for this being directed as a modding question, the cvars change gameplay (dramatically in some cases) just as any mod does. So yes it is a legitimate question for this forum.

to change gravity type this in console

rcon sv_gravity 210

*210 is the level at which you can still jump, yet you float around quite nicely too. for complete 0 grav just replace the 210 with 0.

to see a list of cvar's that you can use just type

cvarlist

in console. it will bring up a nice list for your reference. to see a specific group of cvar's (they all have a certain prefix at the beginning "sv_gravity", "g_teamdamage") just type

cvarlist sv

this will bring up only the cvars with the prefix "sv"


hope that helps a little.