The Ten Commandments of Tremulous

I Thou shalt not cheat.
II Thou shalt build a good base.
III Thou shalt not feed the enemy.
IV Thou shalt not harm teammates (also known as bleeding).
V Thou shalt show no mercy to thine enemies.
VI Thou shalt not spam (shoot at nothing).
VII Thou shalt not camp (stay in base all game).
VIII Thou shalt not spawnkill, nor killwhore.
IX Thou shalt not deconstruct major buildings without your team's agreement.
X Thou shalt use good sportmanship and not insult other players.

Newby Definitions:
Feed = Feeding is when a player runs out of the base and is killed over and over again. This feeds the other team and they will quickly gain an advantage over your team. You will lose quite badly.
Spawnkill = Killing players directly as they come into the game. They have no chance to defend themselves and while your kill count will increase, it is in essence cheating.
Killwhore = Killwhoring is the action of killing opposing team members over and over again, while not attempting to attack or take out their base. Players who do too much killwhoring quickly become unwelcome in the server.