UnderMine (Switch): Software update (latest: Ver. 1.2.1)

On this page, you will find all there is to know about the various Software updates for UnderMine on Nintendo Switch (originally released on February 11th 2021 in Europe and North America)!

Click here for more Software updates!

UnderMine – Ver. 1.2.1

  • Release date: August 26th 2021 (North America, Europe)
  • Patch notes:

No patch notes available. This update brings the following:

  • addresses the crashes that a lot of players have been encountering

UnderMine – Ver. 1.2.0 (WHIP Update)

  • Release date: August 6th 2021 (North America, Europe)
  • Patch notes:


Camilla, Second Disciplinarian and WHIP

Welcome to WHIP peasant! Camilla has occupied Arkanos’ empty library and has a new motivational strategy. The Worker’s Helpful Incentive Program, or WHIP for short, is a daily run mode. Each day Camilla will present you with a random set of hexes, items, and a familiar. Your job is to run either Undermine or Othermine and score the highest score you can. Your best run will be placed on a daily leaderboard against other players. See if you can score the highest!


There is now a log in the journal that stores information about recent runs. See past runs in both Undermine and Othermine. See what their seed was, how much gold was collected, which enemies were defeated, and in the case of WHIP, how high a score was achieved.

Familiar Styles

Each familiar now has an alternate style that can be toggled at a magic mirror in Griswold’s room. Familiar styles can be unlocked by scoring over 100,000 points and completing a WHIP run with a particular familiar.

Canary – Golden Nugget
Chaos Spawn – Stoneforge Discord
Djinn – Whispered Wish
Eidolon – Cruel Spectre
Firebird – Furious Black
Lesser Demon – Stygian Grip
Nikko – Great Demon Monkey
Phoenix – Bird of Paradise
Spirit – Barrel Aged
Sylph – Angelic Charm
Thunderbird – Rolling Storm
Murderous Queen – Hand of the Queen
Pale Likeness – Crystal Skull

New Items


  • Pale Likeness – A familiar that is unlocked after defeating Din. The Pale Likeness tends to do more harm than good.
  • Murderous Queen – A familiar unlocked by defeating the Plunder King in the Bog. The Murderous Queen attacks enemies with poison projectiles and spawns powerful healing blessings called Drops of Honey.
  • Orion’s Sword – Temporarily increase damage when attacked
  • Golden Axe – Spent gold is turned into bonus damage
  • Twin Axe – Gain a second pickaxe
  • Tortoise Shield – Slows enemy projectiles
  • Box of Holding – Pilfer shop items are instantly restocked
  • Magnetized Ore – Teleport enemies next to bombs
  • Lucky Nugget – Enemies drop gold when critically hit
  • Bounty Contract – Adds a bounty to a random enemy
  • Javelin – Damage of a thrown pickaxe increases as it travels further
  • Stoneforge Broth – Gain a legendary relic
  • Earthquakes – Stalactites drop from the ceiling
  • Heat Wave – Enemies become hot to the touch
  • Amnesia – All your relics are destroyed after defeating a boss
  • Starvation – Penance heals, but food and healing potions no longer drop
  • Nemesis – Become prey
  • Stasis – Items are tapped in crystal
  • Blasphemy – Altars are reversed
  • Accursed – All shop items are cursed
Balance Changes
  • Large Ember and Phoenix’s Radiance now ignite torches and cook food
  • Selt’s Egg now spawns 2 larvae with 100% accuracy and faster projectiles
  • Selt’s Egg now spawns larvae faster
  • Plunder King’s collider size has been reduced, his poison splat duration reduced, and his minion cap lowered
  • Galoshes now protect against electrified water in addition to oil and poison
  • Tsar Bomba now spawns 2 bombs instead of 1
  • Bramble Vest has been renamed to Blade Mail and now repeatedly returns damage after being hit
  • Mirror Shield now retains the melee reflect from Grimhilde’s Mirror
  • Arachnophobia now sets the spider’s health to 1 and delays its behavior on spawn
  • Dead Man’s Switch now fires slower arrows with less accuracy
  • Branding Bombs now condemn faster and no longer damage the player. Instead they apply a single level of the Brittleness curse
  • Ursa Major now lasts 100s instead of 120s
  • Ursa Major now has a maximum health increase of 400
  • Waking light now fires from the furthest torch from the peasant
  • Ostiophobia now triggers 50% of the time instead of 100%
  • Ostiophobia can no longer spawn skeletons in the boss room
  • Hay Fever now takes longer to activate
  • Hay Fever now has more delay between plant attacks
  • Tariffs now increase costs by 1.5x instead of 2x
  • Poison Mushroom now grants max health back when it is removed
  • Mutation now procs 40% of the time instead of 50%
  • Lunchbox now drops a piece of food when picked up
  • Sequence Breaker can now warp the peasant to inaccessible areas when combined with a source of throw piercing
  • Shop food can now be poisoned
  • Secretion Wurms have had their per-room cap lowered
  • Knight’s and Archer’s Pendants now give at least +1 damage
  • Chakram now ignites when traveling over fire
  • Frostbite now reduces all healing to 1 instead of removing healing altogether
  • Adventurer’s Peril now increases incoming damage by 10X instead of setting the peasant’s health to 1
Bug Fixes
  • Fixed graphic tiling issues in the entrance to Ponzu’s boss fight
  • Fixed an issue with Ponzu’s bubble splash attack that prevented it from dealing damage
  • Major improvements to Vorpal Blade’s hit detection and facing lock at high attack speeds
  • Vorpal Blade is now better behaved when nullified
  • Fixed a small reflection problem on the walls in the Cavern
  • Tus no longer accepts credit
  • Tus no longer queues his actions, allowing you to donate to him twice with clever timing tricks
  • Familiar tooltip now highlights the third ability if the familiar is level 3
  • Cursed Jars are now affected by Midas Potion and Kiss of the Succubus
  • Rabbit Gloves now make all items in the shop free until an item is purchased
  • Salamander’s Wrath and Venomous now only proc off of physical damage to avoid a “death loop”
  • Gecko Blast more reliably gathers items and hopefully won’t cause them to clip through the floor any more
  • Circinus now works in the first room of each zone
  • Master Pickaxe beams no longer “double tap” bombs, causing them to launch backwards
  • Fixed a minor graphical error when moving into a room with Firebats
  • Bog arrow traps no longer scale their health in Othermine
  • Black Credit Card is no longer allowed on the relic altar
  • Fixed an issue where the portal to the final room would not spawn if Seer was killed too quickly
  • Fixed an issue that caused the invisible door blockers to not spawn correctly in doorways that had been opened with a bomb blast
  • Noori’s portals are now more visible if spawned behind him
  • Sweaty Palms and Fingers no longer queue damage events to keep procing after the damage has stopped
  • Ara will now block curses before Doll does
  • Blessing, Curse, and Hex audio now only play a single instance to avoid a volume increase
  • Fixed a graphical issue that would cause your pickaxe’s trail to continue to render across the screen when transitioning rooms
  • Fixed some exit issues with Core encounters
  • Fixed an issue that could cause Penance to not show as “discovered” in the Journal
  • Selt can no longer pick up bombs after dying
  • Black Rabbit chest game has been fixed to no longer leave floating locked chains if you pull the lever that destroys the chests
  • Caustic Vial now detonates even if the enemy was killed in one attack
  • Fixed some numeric font consistencies across different languages
  • Fixed a display issue that could cause your windowed resolution to get stuck at 1×1
Other Changes
  • Bosses now appear on every run. The summoning stone can still be obtained by defeating all bosses on a single run.
  • The run seed is now displayed on pause menu and the game over screen
  • All constellation relics now mention that they are temporary
  • Red Hot Nuggets now has a visual effect applied to gold
  • Spatial Sickness now uses the unified warp effect
  • Tus now has a pet
  • Many changes have been made to how random events occur. Most things now obey the run seed, making runs far more deterministic.
  • The shortcut between the Dungeon and Halls is now permanent if the player opens it
  • You can no longer pickup potions while drinking
  • Nether can now be crafted at the Gatekeeper by default, no longer requires a blueprint
  • Tent now restores the player to full health and is no longer considered a heal
  • Large enemies will fall into pits less often
  • Removed proc audio from Mushroom
  • Removed proc audio from Sagitta
  • Removed the delay between peeping a skeleton and it dropping treasure
  • Reduced the amount of decimals displayed on the stats tooltip
  • When Sho’Guul runs out of legendary relics he will offer Hot Crossed Buns
  • Rook and Bish Fish should spawn less frequently
  • Large Ember, Phoenix’s Radiance, and Immolate have had their visual effect changed to better indicate their radius
  • Resurrection now has audio
  • Craftsmanship and Sewing Kit will no longer drop if the goldsack has been fully upgraded (unless they have never been discovered)

UnderMine – Ver. 1.1 (Royals Update)

  • Release date: March 29th 2021 (North America, Europe)
  • Patch notes:


The Contested Bog

A gate can now be found at the edge of the Shimmering Caverns. It is guarded by two familiar creatures, but they will only allow access when certain conditions are met. Beware! Even if you discover the conditions for entry, a huge challenge awaits. The Contested Bog is home to UnderMine’s most dangerous creatures.

Plunder King

Deep in the Contested Bog, the Plunder King hoards a pile of treasure in his trove. He has become corrupted by his greed, and the corruption spreads throughout the area. Defeat the Plunder King and claim his crown as your own.

Tus, Wandering Minstrel

Tus is a wandering bard that spreads mello vibes wherever he goes. Tip Tus some gold for his efforts. If he deems your tip generous enough you may receive a reward.

Seed Input

You can now check your randomizer seed from the main menu in the Hub. You’ll also be able to generate a new seed, or input one of your own. You can now play the same randomized dungeon layouts as other players using this menu. This feature can be used for Othermine as well by entering a seed after donning the crown, before entering the portal.

Boss Tracker

Once a summoning stone has been lifted, a boss tracker will appear on the pause menu. This tracker will show the status of each boss.

Poison as an Official Element

Poison has been added as an official element. Now items that interact with elemental damage will also interact with poison. For example, Gordon’s Tunic will reduce poison damage. Certain things will cover the ground in poison. If food touches this it will become poisoned itself, with adverse effects!

Blighted Barb

Poisoned rocks will appear in the UnderMine. Destroying these rocks will give the peasant a temporary poison buff similar to Crippling Poison.

Momentary Peril

You may find a mysterious orb in a start room. Interacting with this orb will give you a temporary curse called Momentary Peril. It sets your health to 1, and gives you a certain number of rooms to clear. If you can clear the rooms the curse will be removed and you’ll be rewarded for your efforts.

Other Secrets

Many other secrets await in the Royals update, but we didn’t want to spoil them. Search every corner of the game to find them.

New Enemies
  • Greedy Pilfer
  • Corrupted Pilfer
  • Goblin Engineer
  • Goblin Scavenger
  • Noxious Goblin
  • Gremlin Harbinger
  • Bishop’s Fish
  • Rook’s Fish
  • Queen’s Fish
  • Bing Bong
  • Secretion Wurm
  • Quilled Golem
  • Bloatfly
  • Pontiff
  • Occultist
  • Hobble Doll
New Items:
  • Ostiophobia (Curse)
  • Dead Man’s Switch (Curse)
  • Hay Fever (Curse)
  • Shrapnel (Relic)
  • Heavy Boots (Relic)
  • M.E.G.A. Bomb (Relic)
  • Some-Potion (Potion)
  • Doppelbock (Potion)
  • Toadvine’s Tonic (Potion)
Bug Fixes
  • Fixed an issue that would cause your Summoning Stone count to be wrong on the pause menu
  • Goldmine 1-3 no longer sometimes spawns Dungeon hidden rooms
  • Fixed a bug that would cause you to drop your potions on the ground after being stabbed by the Gatekeeper
  • Ghost Pepper Sauce has been re-implemented to no longer quench itself with water and to behave better around Antimatter
  • Fixed some number clamping issues in the stats tooltips in the Journal
  • Fixed an issue causing bombs that Selt had eaten to double-explode
  • The Canary will no longer attempt to collect gold enemies
  • Bombushka and trapped chests spread their bombs more evenly, rather than always to the northeast
  • Fixed a minor issue in the Goldmine where water background elements would stop animating when coming back to a room
  • Fixed an issue causing waterfalls, goldfalls, and sandfalls to not spawn correctly
  • Fixed a problem with peasant animations that would cause the hit animation to stop displaying after dying
  • If Tent is disabled via Nullification, you will no longer get a tent in zone start rooms
  • Fixed some load-order issues around Dark Cloud and Nullification that would cause them to not work properly when reloading from a save file
  • Fixed a minor issue with Gargoyles that made them distinguishable to fake Gargoyle statues
  • Fixed an issue where Soul Cannon was not scaling damage on two of its projectiles when used in conjunction with Fork
  • Explorer’s Boots now won’t activate while you are standing on things that aren’t the ground
  • Fixed a bug in the Chaos Familiar’s wheel where the spin audio could get stuck looping if the wheel closed too early
  • Fixed a long-standing crash that could happen if you interact with a thing on the same frame as it’s destroyed
  • Fixed an incredible Metamorphim bug that would allow you to re-roll your Doll relic just as its last charge was consumed (thank you Priskip!)
  • Tightened up when and where the AI navigation mesh is rebuilt to prevent certain enemies from spawning or teleporting into inaccessible areas
  • Improved the logic that tracks the “Drop count” of an item for display in the Journal
  • Added in some more protection around bad data from hand-edited save files could cause crashes on startup.
  • Fixed an issue that would cause secret rooms connected to a hidden room (these are referred to as “secluded” rooms) to wind up on the wrong subfloor during floor layout regeneration and be visible on the minimap at the wrong time
  • Fixed a long-standing issue with the maximized minimap that would make it possible to see secret walls to the east
  • Thickened up the ground hitbox to prevent fast-falling entities from falling right through
Balance Changes
  • Gordon’s Tunic now reduces poison damage as well
  • Spinner traps now scale their damage based on the zone they are found in
  • Arrow traps now scale their damage based on the zone they are found in
  • Transmute machines in “gambling rooms” no longer add health to their cost when used
  • Slightly increased rat health in OM
  • Gremlins have had their AI tweaked and are now much more aggressive
  • Capture Sphere now adds 5 damage per enemy killed instead of 10
  • Galoshes and Helios boots now guard against poison on the ground
  • Added more fury to the Fury Potion
  • Mjolnir now creates its AOE at the target of the thrown pickaxe. Its cooldown has been removed and its damage decreased
  • Reduced the damage done by the Eidolon’s level 3 ability
Other Changes
  • Massive performance and memory optimizations across all areas of the game
  • The “Hobbled” status effect now has a visual associated with it. Being Hobbled dramatically slows your movement speed and prevents you from jumping
  • If your controller becomes disconnected, the pause menu will now open
  • Toxic Scales now deal poison damage
  • Other Scales now deal poison damage when paired with a Toxic Scale
  • Spiders now deal poison damage
  • Vile Pots now deal poison damage
  • Vile Pot damage is now the same whether they were spawned from a Drude or not
  • Caustic Vile now spawns a poison blast
  • Gordon’s Tunic no longer makes a sound when blocking elemental damage
  • Chests can now be trapped with poison (this does not increase the chance a chest is trapped)
  • Artifacts have been moved to a subtab of Items in the Journal
  • Wall gold in the Goldmines now has a halo like other wall gold
  • Wall gold in the Goldmines now uses normalized damage which means it will always take two attacks to mine
  • Wall gold and thorium in the Golden Core now uses triggers rather than colliders so that the peasant can’t bump into it
  • Controller vibration has been normalized and rescaled
  • Items that have been eaten by ItemEater now shatter when they hit the ground
  • Oil now uses a different rendering method (and looks better in our opinion)
  • Bass fly projectiles changed in color so that Bishop and Rook fish can fire projectiles of their color
  • Sequence Breaker has a new teleport effect in line with other warp effects in the game
  • Adjusted many FX emitters to work on unscaled time to prevent drawing on the opposite side of the room during transition
  • Vorpal Blade refacing timings have been improved to better match the visuals

How to download updates for UnderMine for the Nintendo Switch?

To download the updates for UnderMine, you have three options:

  • let the console do its thing if you have automatic downloads activated, and didn’t completely turn it off

If not…

  • try to launch the game from the Home Menu while being connected to the internet. You should get a prompt when doing so: simply follow the instructions on screen;


  • select the game > press either + or – to go to the Options page > select Software update > select Via the Internet.

To check that you have the latest version installed, simply select the game on the Home Menu, and press – or + to go to the Options: the version number is displayed just below the game title.



Founder and main writer for Perfectly Nintendo. Tried really hard to find something funny and witty to put here, but had to admit defeat. Also known as Maintenance Guy by some.