would anyone have a full cvar list of all the cvar's we could use in hl2 when we enable the sv_cheats and stuff?

Bear in mind some servers will ban for this and some servers have the new KAC with a global ban system. Number after is the default settings.

bat_version", "0.0"
est_version", "0.0"
eventscripts_ver", "0.0"
mani_admin_plugin_version", "0.0"
metamod_version", "0.0"
sourcemod_version", "0.0"
zb_version", "0.0" Running zBlock on your client makes you unkickable
sensitivity", "100.0"
sv_cheats", "0.0",
sv_consistency", "1.0", enforcing of models
sv_gravity", "800.0",
r_drawothermodels", "1.0"
cl_clock_correction", "1.0"
cl_leveloverview", "0.0"
cl_overdraw_test", "0.0"
cl_particles_show_bbox", "0.0"
cl_phys_timescale", "1.0"
cl_showevents", "0.0"
fog_enable", "1.0"
host_timescale", "1.0" 1.1 = 1.1x speedhack etc..
mat_dxlevel", "80.0" 70.0 Give a basic Wallhack
mat_fillrate", "0.0"
mat_proxy", "0.0" ASUS like wallhack
mat_wireframe", "0.0" Wireframe rendering
mem_force_flush", "0.0"
snd_show", "0.0"
snd_visualize", "0.0"
r_aspectratio", "0.0"
r_colorstaticprops", "0.0"
r_DispWalkable", "0.0"
r_DrawBeams", "1.0"
r_drawbrushmodels", "1.0"
r_drawclipbrushes", "0.0"
r_drawdecals", "1.0"
r_drawentities", "1.0"
r_drawopaqueworld", "1.0"
r_drawparticles", "1.0"
r_drawrenderboxes", "0.0"
r_drawskybox", "1.0"
r_drawtranslucentworld", "1.0"
r_shadowwireframe", "0.0"
r_skybox", "1.0"
r_visocclusion", "0.0"
vcollide_wireframe", "0.0"

they can detect the cvar's through the hack? and whats kac? are the league proof's undetected by it?

KAC = Kigens Anti Cheat it's a server side plugin. Some leagues probably detect forced CVAR's but don't know which.