Edited: No new Achieve or Pets but there is a cosmetic addition (see bottom!). Horsemen's loot is now 835. And... That's the biggest thing really. :/
Things to do for Hallow's End...
Do the Achievements to get almost ALL the candy buckets! (Free gold, exp, and guild rep!!)
Kill Horseman! Theres Rings, a Agi Sword, Plate Helm, MOUNT, Temp Broom Mount, Squashling Pet, and a Hallowed Helm to be had!
Do Garrison Dailies! (See Details under Achievements.)
Buy Costumes! (50 charge Only) Lich King, Deathwing, or Grommash
Get you some pets!
Squashling- 150 Treats or Horseman
Feline Familiar - 150
Cursed Birman - 150
Widget - 150
Ghastly Rat, Ghost Maggot, Spectral Spinner- Pet Battle with Creepy Décor (Lower for some details! Under 2015)
Dress the pets as the Mad Alchemist, Lil Starlet, Yipp- Saron, or Void them with a Ominous Pet treat! All 5 or 150 treats.
Toys?! YES!
The Little Wickerman is only 150 and acts as a fire!
Coin of Many Faces has a chance to drop (see 2015 Section!)
Sack of Spectral Spiders drops off a boss from Garrison Creepy Décor.
Dailies maybe?
TRICK OR TREAT! :D (Hey its how you buy the stuff!)
Oh idk... Throw a party?
Achievements:
Me the Head of.. Oh wait
Kill Horsemen! Must be near cap to do this.
Check your head!
Throw the Jack-O-Lanterns at each race listed! Can be gotten from Horsemen, dailies, and gifts.
GNERD Rage!
Earn 10 Honorable Kills with the GNERDS buff. Get the candy from treat bags or vendors.
Out With it
Eat your Tricky Treats till you toss it up.. Eww... 5+ Candies to get to that point.
Rotten Hallow
Ruin the others fractions fun by doing the 4 Dailies/Quest, including dousing their Wickerman and lighting yours!
Sinister Calling
Get that Squashling pet and the Hallowed Helm! Use to you had to kill Horsemen but now its just 300 candy for them!
That SPARKLING Smile!
Use a tooth pick...
Masquerade
Join groups in LFG to trade costumes or just ask in General chat. Do the ones on the list, Done!
Savior of Hallow's End
Save the Village from the Horsemen! Just do, Let the Fires Come daily. Don't forget to loot the head!
Trick or Treat!
Get Candy from a bucket, any bucket...
Trick Or Treats of Eastern Kingdom, Kalimdor, and Northends (These are needed for title!). Then Northrrrend, Cata, and MoP.
A Frightening Friend (Not part of Title)
Get Scarecrow Pepe!
A Mask for All Occasions
Collect every mask! Can be gotten with treats or from Treat bags! Not part of Main Achieve.
The Hallow Title is rewarded for getting all of these! (That aren't marked otherwise!)
2015: Three new pets, one new Achieve, Décor for Garrisons, and 2 new toys.
Pets:
Ghastly Rat
Spectral Spinner
Ghost Maggot
All three will crawl your garrison with the thanks of the Décor Creepy Crawlers.
New Achievement:
A Frightening Friend
This meta awards the Scarecrow costume Pepe for finding him on a tombstone in your garrison.
Décor for Garrisons:
Buying one per day after doing dailies you can trick out in one or all of these themed choices.
Ghoulish Guises: "Dress your garrison's guards in festive costumes."
Hallow's Glow: "Pumpkins, candles and other decor for your garrison."
Seer's Invitation: "Invites an Arakkoa seer to your garrison."
Witch's Brew: "A Pandaren Brew Witch, who brings plenty of fresh brew for your garrison."
Creepy Crawlers: "A ghoulish box of spectral rats, maggots, and spiders."
Check then out this Friday for Screenies!
New Toys:
Coin of Many Faces: Dropped by the Skeletons from dailies. Average chance of 1% drop. Luckily, you can buy off the AH if you get tired of the farm!
Sack of Spectral Spiders: Creepy Crawlers Décor needed to summon the rare. Be warned though "fixed" its still iffy on if you can loot more then one item off the spider. Because of this turn off auto loot and ONLY LOOT THE TOY (or atleast loot it first). You can kill it as much as you like but you can only pick up the items once a day. Easily farmable if you just don't pick up the loot!
Other:
You can buy the heirloom upgrades for a butt load of candies as well as a Deathwing costume for 200 candies if you like!
Side note: Arthas costume is now 200 with 50 charges, unlike last year when he was 500 candies with one charge. Still people bought it!
2016 Edit:
For the hats, you'll need to kind of... Well, Follow the Screenies!
Get Quest In NEW Dal...
Fly to Bradensbrook...
Go to Turn in...
Accept Daily...
Kill!!
Turn in...
Rinse, repeat!
And that's all for now Ghouls!
Elve
Edit With some hats?
Theres 4 but I only got 2. :/