Major Achievements:

Hmmm Bacon: Beat the "Fear Supermarket" minigame.

Up Up!: Beat the "Fear Darkness" minigame.

Get'em George: Beat the "Fear School" minigame.

I Had No Choice!: Beat the "Big Neighbor Boss" (not sure what to call it).

No More Fears: Defeat "The Thing".

Minor Achievements:

"Top of The World": Get to the top of the windwill of the neighbors house.

Shoot Em Up!: Get 3 pieces of cake and all 4 dummies and bring them to the party room to get the gun.

Meet Joe Black: Get a dummy ran over by a car.

Space Jam!: Put the basketball into the hoop on the left side of the neighbors house.

Don't Bite Snow White: Get the seed, plant and water it in the patch of dirt outside of the neighbors house, when it's done growing get the apple from the tree. When you grab the apple that's the achievement. (You can also get the apple out of bounds inside of a specific tree)

Out of Bounds Achievements

NOTE: For all of these achievements you have to touch each building.

Wrong Place To Bury: Get on the graveyard (you should get this achievement as soon as you spawn out of bounds if you use the teleporter hidden in the neighbors house)

Back to School: Go to the school

No Swimming: Go to the factory

Beeep!: Get to the golden apple supermarket

Don't Tell Anyone!: Go to police station

Is She Ok?!: Go to hospital

Change For Gas: Go to gas station

IMPORTANT NOTE

If you want a more in-depth guide for each achievement I suggest using this guide.