Well Dweller has 41 Steam achievements. The names and descriptions below use the official English Steam text.
| Achievement | Official description |
|---|---|
| Once Upon a Time... | Collect a story page |
| Dark Garden | Defeat the Groundskeeper |
| Hobby Collector | Collect a trinket |
| Solo Spirit | Return a spirit |
| Snatched Up | Meet the Hunter |
| First Purchase | Buy something from Looter's shop |
| A Warm Fire | Go camping with Ilda |
| Ten Slots | Collect 10 trinket slots |
| Buggy Business | Defeat the swarm |
| Warming Up | Kill 100 enemies |
| Down the Drain | Defeat the Lady of the Drains |
| Littlest Bird | Collect Egbert |
| Experienced Collector | Collect 10 trinkets |
| In the Workshop | Upgrade a trinket |
| Hide and Seek | Evade the Queen |
| Pyromaniac | Throw 100 flaming vessels |
| Taking a Break | Visit the spa |
| Into the Deep | Gain access to a water vessel |
| Stormy Night | Defeat the Shrine of the Seven Sons |
| Double Trouble | Collect Thimble and Thistle |
| Song of the Stars | Defeat the Starsinger |
| On Fire | Kill 500 enemies |
| The Kings Cap | Buy a festive hat |
| Fancy Feast | Win over the Forest King |
| 50 Slots | Collect 50 trinket slots |
| Halfway There | Return 10 spirits |
| In the Dollmaker's House | Collect Magda |
| Stitched Up | Put Looter back together again |
| Dig Deep | Defeat the Gravedigger |
| Late Night Guest | Escape Webdrench Inn |
| Above the Kingdom | Collect all pages for "The Lookout Tower" |
| Sharp and Shiny | Defeat the Silver Doll |
| The End | Battle the Queen |
| Full Flock | Return 20 spirits |
| The Tattered Doll | Collect all pages for "The Dollmaker's House" |
| Expert Collector | Collect 32 trinkets |
| The First-Born Daughter | Collect all pages for "The Witch's Bargain" |
| Flying High | Learn to soar |
| Together at Last | Reunite the flock |
| Fully Stocked | Upgrade all of your trinkets to the maximum amount |
| Bouncing Bottles | Juggle a flaming vessel 10 times without it breaking |