Distant Bots:
I gave some bots different weaponry that all had a built-in feature to randomize distant shooting sounds. Weapons have their own set of distant sounds.
Fake Lensflare:
I created a really big flare file where the flare met up at the middle and there was a 'reflection' in the bottom corner so when the player looks to the right and can see the flare they'll see the fake reflection, which can make something cooler if done right.
Right here.I am currently working on a TDM, my next goal is to have players yell out a taunt when killing the enemy, actual voices.