Garry's Mod/YMMV


 * Abridged Arena Array: rp_downtown for the Dark RP gamemode.
 * gm_construct and gm_flatgrass are this for the regular sandbox mode, but they're slightly more justified in that they're the only two official maps that come with the game (not counting ones imported from other games), whereas rp_downtown is a custom map.
 * Base Breaker: The update that removed HLDJ and HLSS functionality. Garry got tired of micspammers and complaints about them and, in a rash decision, disabled "voice inputfromfile. Eventually, Garry saw the complaints about removing the line of code were even more annoying than the complaints he got for allowing mic spamming, and reenabled it.
 * GMOD 10 being less pose-friendly than GMOD 9. People got around it, however.
 * Humanoid Abomination: A lot of them. Special mention goes to the Vagineer, the Engina, Dic Soupcan, and many more.
 * Memetic Mutation: SCOUT IS DELICIOUS
 * HAAAAAAAAX!!!
 * Most Annoying Sound: Somebody has already released a custom Vuvuzela swep.
 * Nightmare Fuel: The Eppaljeck.
 * And the shadows come to spirit away away another hapless citizen.
 * For G Mod 13, Garry removed the restrictions on facial muscle animation, and added some more ways of manipulating bones. Not good idea.
 * I am PAINIS Cupcake. I will eat you.
 * How about when Scout shows his manface or something? Sweet Dreams...
 * The giant "ERROR" model that replaces objects if their models can't be found. Especially if it's moving... *shudder*
 * It Got Worse, someone actually put PAINIS Cupcake into a map, and distorted the sounds he makes, just don't press the button.
 * Nothing Is Scarier: As you'll often be The Aloner (unless you're in Multiplayer, of course), this can kick in on night-time maps, or just in general. Also how most horror maps do their business, since the closest thing to getting scary with Mooks are the regular Headcrab Zombies (packaged with G Mod), and those often get boring fast. Combined with Hell Is That Noise, maps like Gm_Ghosthunt and Gm_Scream have terrified audiences without even showing an enemy.
 * Paranoia Fuel: The aforementioned Harmless Companion Cube.
 * And the map "Paranoia" found on the official Gmod site.. I DARE you to go to paranoia and not be freaked out.
 * There's also a Harmless WATERMELON, which does exactly the same thing as the cube.
 * Heck, there's a Friendly Gnome that does everything the Harmless objects can do, with added features.
 * Try to not feel paranoid when you got the SNPC Horror flashing every so often and can kill you quickly if you miss him.
 * Bonus points if you've spawned multiple horrors.
 * The aforementioned ghost of RP_Downtown.
 * Someone... they did it.. The weeping angels..
 * Now, I am everywhere...
 * They Changed It, Now It Sucks: The menu screen was changed from a Citizen putting a traffic cone on the G-Man to a more serious shot of a Citizen holding the Physics Gun over his shoulder and the Tool Gun in the other hand. Some people were not amused.