Unwritten game rules...

[Hakuro de Killer]

Another Elder Scrolls rule: Every single guard WILL know that you stole that one potato on the other side of the map.

[RichardtheDragon]

*this is what the imperial guard actually believe.

also, from scott pilgrim and river city ransom, all bad guys explode into coins.

[RichardtheDragon]

*warioland 4* if you have an allergic reaction, hit yourself in the head

[Calcos323]

Saints Row 3: If you aren't pressing the Fun button at least once every 30 seconds, you're doing it wrong.

[PatrickD]

If anyone ever takes an arrow to the knee, they will eventually become a guard in Skyrim.

[Kupo]

Pokémon R/B
Missingo: Fun to play with, not fun to save with.

Chocobo's Dungeon (Wii)
Save before forging and trying to get beyond the talon/saddle max value cap.  Reload if you fail; don't waste the Gil raising the value up to max and then try to push the envelope again.

Doom series
Nightmare difficulty: just don't do it... unless you're confidant you can punch or chainsaw your way to victory on most (if not all) levels on Ultra Violence.

RPG Maker series
Voice acting doesn't always add depth.

[kakashiyeah]

If you're low on health eat something food will always heal you.

[Charlie2Kairi]

If you're low on health eat something food will always heal you.

No in Legend of Zelda you're grabbing fairies... wow that sounds so wrong

[RichardtheDragon]

Metroid Series: everyone's always trying to clone Metroids....

[JediOfRealms]

This may seem cheap.  But here are 2 very good skill leveling tricks for Elder Scrolls V Skyrim.

Stealth to 100
At the begining of the game.  When you encounter the Bear in the cave.  Go to the right, until you see a set of rocks you can jump on.  WHILE SNEAKING.  Jump on the rocks and face a while.  WHILE SNEAKING.  Run into the wall.  Apply weight, or rubber band to the controller and level.  It will take you about 2 hours to level yourself to level 100 this way.

Craft to 100
Just spam make iron daggers.  buy lots of iron ore and dagger making stuff.  Then run around making them until you run out and sell them.  Make sure to do some quests before doing this, as you will use up like 1,000 gold pieces and lose a profit.  Now just sleep for 2 days straight and repeat the process.  Before you know it, you will have craft to 100.

[Keyblade Prime]

Kingdom Hearts: Getting lost on the plot is normal and so is the urge to reach though the TV screen and punch Demyx after the time limit expires on the water clone part and you have too start the boss-battle again.

[TheSuperFlip]

UMVC3: ALWAYS wait it out against a Level 3 X-Factor Wesker or Wolverine.
DooM: Become one with the map.

My mind's going blank on anything else at the moment, might think of more later.

[RichardtheDragon]

all mario games: if you have a dollar, you can pay off the grim reaper