Ok, i've read a trigger_if topic but i can't find any info on how to use it the way i want.
for example, if i wanted it to play a sound at the end of a match, i don't know what to write in 'Condition'.
I know this is a bit of a newb question but can anyone please help me?
trigger_if checks a condition when it is triggered. You can't trigger entities at the end of a match. At least not without using Lua. So trigger_if is totally useless in your case. You have to use Lua scripting and the endround hook.