1) Don't demean or ridicule gay, lesbian, or transgendered people.
2) Don't admit to piracy or tell others they're pirates.
3) Don't say something that is sexist or racist.
4) Don't deny the Holocaust.
5) Don't say you want to have sex with your daughter.
6) Don't tell Evilore to eat a bag of shit.
7) Don't say every game on a particular platform is crap.
8) Don't spoil something that most people haven't seen.
9) Don't make a joke in a topic about someone who has just died, or in a topic about someone who has just had something really terrible happen to them.
10) Don't post gigantic pictures of pornography.
11) Don't hack the site or steal a moderator's account.
12) Don't tell a moderator to "fuck off" during a debate.
13) Don't tell people you object to anything on the basis of your religious views.
14) Don't steal from people in the buy/sell/trade thread.
15) Don't claim to have insider information when you are not actually an insider.
16) Don't threaten someone's life or say you wish a real person was dead, unless that person is a killer, murderous dictator, terrorist, or other vile person.
17) Don't post a topic specifically to make fun of another topic.
18) Don't post personal information about a forumer, especially if that forumer is part of the gaming industry.
19) Don't admit to enjoying any criminal activity that harms another person.
20) Don't post anything so vulgar that you'd be ashamed to read it to your best friend.