I will also continue the work of Gordura Vegetal to keep the list up to date with current achievements.
Secret achievements discovered: 173/179
Winter Update 2018 (12.00): 3/3
- (ID# ¿484?) Champion of Summer
- (ID# ¿483?) Champion of Winter
- (ID# 477) Tied the Knot
- (ID# 474) Areas of Effect
- (ID# 467) Milennial falcon
- (ID# 466) Spectulation
- (ID# 446) High and Dry
- (ID# 445) Master Debater
- (ID# 443) Cobbled and Patched (This was a secret achievement but was made regular during update 12.00)
- (ID# 435) ______ [Obtainable by unlocking 100 hard monsters in the Cyclopedia.]
- (ID# 433) Serious Contender
- (ID# 431) Little Big Adventure
- (ID# 421) Fairy Teasing
- (ID# 418) Treasure Hunter
- (ID# 417) Forbidden Knowledge
- (ID# 416) Forbidden Fruit
No secret achievements added
Winter Update 2015 (10.9): 0/0
No secret achievements added
Random Patch (10.81): 1/1
- (ID# 406) The More the Merrier (0 points)
- (ID# 405) Lost Palace Raider
- (ID# 368) Hoard of the Dragon
- (ID# 365) Wail of the Banshee
- (ID# 364) Go with da Lava Flow
- (ID# 363) Robo Chop
- (ID# 362) Rumble in the Plant
- (ID# 361) Plant vs. Minos
- (ID# 356) Lion's Den Explorer
- (ID# 354) Combo Master
- (ID# 341) Nevermending Story
- (ID# 327) Repenter
- (ID# 325) Task Manager
- (ID# 324) True Dedication
- (ID# 319) Goo Goo Dancer
- (ID# 318) Final Strike
- (ID# 317) Gnomebane's Bane
- (ID# 316) Death from Below
- (ID# 315) Death on Strike
- (ID# 314) Fall of the Fallen
- (ID# 313) Diplomatic Immunity
- (ID# 308) Dungeon Cleaner
- (ID# 297) Bibby's Bloodbath
- (ID# 295) Pwned All Fur
- (ID# 243) Goldhunter
- (ID# 244) Trail of the Ape God
- (ID# 245) Someone's Bored
- (ID# 246) Whistle-Blower
- (ID# 247) Torn Treasures
- (ID# 248) Loyal Subject
- (ID# 253) Preservationist
- (ID# 276) Navigational Error
- (ID# 281) Gem Cutter
- (ID# 241) Pwned A Lot of Fur
- (ID# 217) Doctor! Doctor!
- (ID# 216) _____ [could also be ID# 220]
- (ID# 215) Shaburak Nemesis
- (ID# 214) Askarak Nemesis
- (ID# 213) Deer Hunt
- (ID# 212) Firefighter
- (ID# 211) Invader of the Deep
- (ID# 210) Eye of the Deep
- (ID# 209) Biodegradable
- (ID# 208) Mageslayer
- (ID# 207) Slimer
- 8.7 - 31/32 Secret Achievements
- 8.62 – 30/32 Secret Achievements
- 8.61 - 10/10 Secret Achievements (11/11 including notorious woldsaver)
- ≤8.6 - 44/45 Secret Achievements
- (ID# 206) Master Shapeshifter
- (ID# 205) True Colours
- (ID# 204) Berry Picker
- (ID# 203) You Don't Know Jack
- (ID# 202) Truth Be Told
- (ID# 201) Nomad Soul
- (ID# 200) Dark Voodoo Priest
- (ID# 199) Snowbunny
- (ID# 198) Silent Pet
- (ID# 197) Something's in There
- (ID# 196) Safely Stored Away
- (ID# 195) _____
- (ID# 194) Ashes to Dust
- (ID# 193) Skin-Deep
- (ID# 192) I Like it Fancy
- (ID# 190) Petrologist
- (ID# 189) Natural Born Cowboy
- (ID# 188) Honorary Witch
- (ID# 187) Pyromaniac
- (ID# 186) Fire Devil
- (ID# 185) Banebringers' Bane
- (ID# 184) Witches Lil' Helper
- (ID# 183) Fire Lighter
- (ID# 182) Scourge of Death
- (ID# 181) Nether Pirate
- (ID# 180) Spectral Traveler
- (ID# 179) Ghost Sailor
- (ID# 178) Nanny from Hell
- (ID# 177) Baby Sitter
- (ID# 176) Cake Conqueror
- (ID# 175) Extreme Degustation
- (ID# 171) Bunny Slipped
- (ID# 145) Heartbreaker
- (ID# 144) Commitment Phobic
- (ID# 143) The Day After
- (ID# 141) True Lightbearer
- (ID#140 ) Keeper of the Flame
- (ID# 139) Mutated Presents
- (ID# 138) With a Cherry on Top
- (ID# 137) Sweet Tooth
- (ID# 136) The Cake's the Truth
- (ID# 135) Cookie Monster
- (ID# 134) The Undertaker
- (ID# 133) Gold Digger
- (ID# 132) Homebrewed
- (ID# 131) Natural Sweetener
- (ID#130 ) Happy Farmer
- (ID# 129) Nothing Can Stop Me
- (ID# 128) Bad Timing
- (ID# 127) Let the Sunshine In
- (ID# 126) Do Not Disturb
- (ID# 122) _____
- (ID# 120) Free Items!
- (ID# 119) Cursed!
- (ID# 118) Santa's Lil' Helper
- (ID# 117) Make a Wish
- (ID# 116) Rocket in Pocket
- (ID# 112) _____
- (ID# 110) Bluebarian
- (ID# 109) Oops
- (ID# 108) Joke's on You
- (ID# 107) Modest Guest
- (ID# 106) Rock Me to Sleep
- (ID# 105) Mister Sandman
- (ID# 104) Devovorga's Nemesis
- (ID# 103) Cocoon of Doom
- (ID# 102) Slayer of Teneshpar
- (ID# 101) Slayer of Phrodomo
- (ID# 100) Slayer of Irahsae
- (ID# 99) Slayer of Chikhaton
- (ID# 98) Slayer of Anmothra
- (ID# 97) Daring Trespasser
- (ID# 96) Teamplayer
- (ID# 95)Notorious Worldsaver REMOVED IN UPDATE 9.4
- (ID# 94) I Did My Part
- (ID# 93) Jamjam
- (ID# 92) Exquisite Taste
- (ID# 91) Cold as Ice
- (ID# 90) Clay to Fame
- (ID# 89) Marble Madness
- (ID# 88) Turncoat
- (ID# 87) Superstitious
- (ID# 86) Vanity
- (ID# 85) Steampunked
- (ID# 84) Ship's Kobold
- (ID# 83) Polisher
- (ID# 82) Quick as a Turtle
- (ID# 81) Fireworks in the Sky
- (ID# 80) Party Animal
- (ID# 79) Marblelous
- (ID# 78) Lucky Devil
- (ID# 77) Jinx
- (ID# 76) Interior Decorator
- (ID# 75) Ice Sculptor
- (ID# 74) Potion Addict
- (ID# 73) Green Thumb
- (ID# 72) Here, Fishy Fishy!
- (ID# 71) Firewalker
- (ID# 70) Deep Sea Diver
- (ID# 69) Masquerader
- (ID# 68) Clay Fighter
- (ID# 67) High-Flyer
- (ID# 66) Allowance Collector
- (ID# 65) Rockstar
- (ID# 64) Waverider
- (ID# 63) Wayfarer
- (ID# 56) Herbicide
- (ID# 52) Worm Whacker
- (ID# 50) Razing!
- (ID# 49) His True Face - (Second way implemented in 8.61)
- (ID# 36) _____
- (ID# 30) Territorial
- (ID# 28) Ministrel
- (ID# 27) Poet Laureate
- (ID# 14) Fountain of Life
- (ID# 9) Lord Protector
- (ID# 8) Dread Lord
- (ID# 7) Backpack Tourist
- (ID# 6) Shell Seeker
- (ID# 1) Castlemania
Official achievements listed on the website secret changes: (web.archive.org)
- 03-07-2010: 45
8.6 achievements - 26-08-2010: 56 (+11) 1 Later removed (Notorious Worldsaver)
8.61 achievements - 01-01-2011: 120 (+64)
< 9.0 achievements - 16-07-2011: 131 (+11)
9.1 achievements - 28-09-2011: 132 (+1)
9.2 achievements - 01-01-2012: 140 (+8)
- 15-07-2012: 150 (+10)
- 29-11-2012: 149 (-1)
Removal of Notorious Worldsaver - 16-01-2013: 151 (+2)
- 15-07-2013: 152 (+1)
9.4 -> 10.1 (21/21) achievements added + 1 removed - 18-07-2013: 153 (+1)
10.1 achievements - 12-01-2014: 154 (+1)
10.3 achievements - 24-07-2014: 155 (+1)
10.5 achievements - 20-12-2014: 161 (+6)
10.7 achievements - 22-06-2015: 163 (+2)
10.8 achievements - 04-10-2015: 164 (+1)
10.81 achievement - 07-12-2016: 167 (+3)
11.1 achievements