As you may know, I am no killwhore, I am no l33t, I am more the tactical type. One tactic that in my humble opinion is WAY too rarely seen is a classic that goes back to nobody less than Alexander the Great:
Hammer and anvil
The idea is quite simple: You have two bulks of worriors facing each other, each of comparable strength, and none really in advantage. Then comes another force - needn't be especially strong, a relatively small force usually is enough - from the back.
This brings the enemy's fighting order into disarray, and even if their forces are stronger, this may be “it”, and you have a pretty good chance to elimate your opponent.
Alexander the Great did this with armies, but in Tremulous you can do that aswell. Examples are the edge of the platform of the default bases in ATCS and the bridge of human default in Karith station. In ATCS, you can get a raging tyrant between “hammer and anvil” if some defenders face him while it rushes up the ramp, while others jump down and get behind it. And even if those who get behind the tyrant may get killed by the big plushy friends of the tyrant, this will keep him from escaping and give the human team an extra kill. A similar trick works with the bridge above human default in Karith station or - the tunnel in ATCS. Ever seen aliens sneaking through human base and trying to get into the tunnel and behind an attacking human team? Exactly. Easy kills for the alien team.
