SM Command 2

[Byte]

In relation to this,

the !ff command seems to enable friendly fire but is not triggering mp_teammates_are_enemies 1.

That was my fault, I forgot to remove the version of the plugin I made where I was using !ff.

!ff in chat should print out if friendly fire is on or not (default sourcemod command).
!toggleff should properly toggle friendly fire (with mp_teammates_are_enemies).

I initially used !ff for my plugin not knowing sourcemod was using it too but I removed it now.