Spore/Nightmare Fuel

"That's My Lunch" appears to be a harmless adventure about a little girl and her kittens, rabbits, chicks and...one-eyed lizard babies. You get an invitation to the girl's birthday party at "Hugs Valley". You have to escort the girl to the party, while secretly feeding the animals to these two hungry monsters. To do this, you have to distract the girl with things like a butterfly net. Then you have to lure one of the animals into the beast's lair with candy. Eventually, there's none left, and the girl finally reaches the party. She then looks at the player and says that you've just sold your soul to pay for the gifts. And the guys who made Robot Chicken made this!
Other things of note are "UBD" creations, some of the more...obscene creatures, and Roadkill Roadrunner.
- Many of their missions are like that; go play Shenanigan's Funhouse. Monster Clown, Death Traps, and killer woopie cushions.
Creatures with the Bard Archetype are meant to be fun-loving party-goers. Sounds awesome, right? Then you read the Blocks of Chance, which contain gems like these:

"There is no purpose. There is no value. There is no point. Life is ridiculous."
"The universe is one big joke, and the joke is on us."
"The best we can hope for is entertainment. We'll get along as long as you provide amusement - fighting our wars for us, fixing our worlds, looking for meaning where there is none, and groveling in the dirt to fetch us plants. So keep it up! Just remember that we're laughing all the time."

- And then there's their dialogue...
The mission from Galactic Adventures called "It Came From The Sky." The mission is about a spaceship that crashed near a research base on a frozen planet. You see green lumps of skin on the ground from the creature that piloted the spaceship, and you talk to some of the researchers working at the base who tell you that most of the other researchers are either sick or dead. You then discover a trail of the green lumps leading to the sole surviving alien from the spaceship, who tells you that he accidentally made the researchers sick, but one of the researchers' daughters has an immunity to the disease. She follows you and then you discover that the researchers have turned into zombies when you see one of them attack and kill another one. You then have to defend the girl from the zombies as you lead her to an extraction point. The creepiest thing about this mission, however, is probably the music.
- It gets even worse when you realize this adventure is based on H.P. Lovecraft's The Colour Out of Space.
There's another Maxis Adventure that kept this troper on his toes, the one called "The Spirits Are Restless." You start out at a town that's been harassed by wild beasts. The mayor asks you to see a druid at the nearby forest. Said druid then tells you that the forest has been corrupted by an Eldritch Abomination, causing the beasts to attack the village. He gives you a staff to go cleanse the shrine where the spirit has taken residence. The only thing standing between you and victory are packs of hostile animals and a creepy forest littered with fog, cobwebs and skeletons. All the while, a music track made of Scare Chords is playing. This adventure is NOT for the faint of heart. You Have Been Warned.
The soundtrack "Alien Abduction" :http://www.youtube.com/watch?v=KY 1 t B Aun INY and the soundtrack "Echoes Underwater" which is even worse.