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Gameplay
TheBiomex Mod
par shadoethedoev1.1.0
A fully developed retro character for Slay the Spire 2. Likely about as strong as the Ironclad. Created by @Shadow-jj6fm. — Made with the STS2 Character Creator
Créé
31 juil. 2026
Mis à jour
31 juil. 2026
Description
Cette description est fournie en anglais par l'auteur du mod sur Nexus Mods.
CHECK OUT THE RIFTER MOD!!!: TheRifter Mod at Slay The Spire II Nexus - mods and community
This mod contains 20 Commons, 25 Uncommons, and 20 Rares to match the usual characters. It also has 2 basics and 1 token. New cards are unlikely, to not mess up the role or scaling. Has cards including the Silent.
Description
A fully developed retro character for Slay the Spire 2. Likely about as strong as the Ironclad. Created by @Shadow-jj6fm. — Made with the STS2 Character Creator
Expect a lot of toxin.
Shows in rest sites, ancient dialogue, and character select.
New updates or fixes will not ruin your compendium or save! <3
1 orb slot.
Installation instructions
1. Unzip this file. You will see two folders:
TheBiomexMod/ (this mod)
BaseLib/ (the modding library this mod is built on)
2. Copy BOTH folders into your Slay the Spire 2 mods folder:
Steam\steamapps\common\Slay the Spire 2\mods\
(create the mods folder if it isn't there yet). You should end
up with:
mods/
TheBiomexMod/
BaseLib/
3. Launch Slay the Spire 2. The first time you run mods, the game
shows a mod-loading warning — accept it, then enable both
BaseLib and TheBiomexMod in the in-game Mods menu and restart.
4. Your character appears on the character select screen.
Both folders are required. If BaseLib is already installed from
another mod, you can skip copying it — but keeping this copy is
safe (same version, it just overwrites).
Main features
I expect it to be moderately unbalanced but that's okay, this mod compiles several aspects of characters, creating a powerful acidic defending titan. They specialize in power stacking, defense, and poison.
New Playable Character: The Biomex, a retro pixel wanderer lost in a painted world.
60+ Custom Cards:
Custom Relics: Including the Biomex Immunity, designed to heal poison.
Unique Mechanics:
Custom Art:
English Localization
Recommended Playstyle
Requirements
BaseLib
BaseLib by Alchyr — https://github.com/Alchyr/BaseLib-StS2
Shout outs
Alchyr — GitHub - Alchyr/BaseLib-StS2: Mod for Slay the Spire 2 to standardize content additions · GitHub
Spencer — STS2 Character Mod Creator
MegaCrit — Mega Crit Games
The Great List of Cards:
Strike Defend
Venomous MawAttack · Common×The Silent's BaneSkill · Common×Fuming BiohazardPower · CommonPay The SilentSkill · CommonPoison GemSkill · UncommonToxic PrickPower · UncommonCorrosive DosePower · CommonVolatile SludgePower · CommonResidual VenomPower · CommonTail StabAttack · UncommonCataclysm EchoPower · RareTitrationPower · CommonSurface ContaminantPower · RarePathogenPower · CommonLickPower · UncommonAbiotic LockSkill · RareTail WhipAttack · UncommonTail ImpaleAttack · UncommonToxin MorningstarAttack · CommonTalk To Television ToddSkill · RarePoison OrbSkill · UncommonAcid OrbSkill · UncommonFryPower · RareTail BlockSkill · UncommonKeep BlockPower · UncommonCharge Your VialSkill · CommonEmpty Your VialSkill · CommonPurest HatredAttack · RareMakeshift HandgunAttack · RareSpore BarrierAttack · UncommonTrading CardAttack · UncommonVenom ClaymoreAttack · UncommonVicious PuddlesAttack · UncommonAxeAttack · UncommonSwampAttack · UncommonEvocationSkill · RareSterile ShieldSkill · RareBiohazard BraceSkill · CommonPower UpSkill · RareRadiation ExposureAttack · UncommonSample BagSkill · CommonPutrid HammerAttack · RarePoisonous Poison?Skill · UncommonChild's LoveSkill · RareQuakePower · RareTeeth of DoomAttack · RareRespawn ShardSkill · RareLong SliceAttack · CommonOverfocusSkill · UncommonVenn DiagramSkill · CommonSelf-SlimeSkill · UncommonLayered GuardSkill · RareFoamSkill · CommonGelatinous WallSkill · UncommonBottle of Living IceSkill · CommonHardenSkill · UncommonDriftSkill · RareBio-MechsSkill · RareSpore ProbeSkill · RareRaise ThornsPower · UncommonOrb of DecayPower · UncommonToxin ReservoirSkill · UncommonGrowSkill · CommonCircle of LifeSkill · CommonCause and EffectAttack · Rare
Starting Relic: Biomex Immunity - Reduce 12 poison when a card is played.
This mod contains 20 Commons, 25 Uncommons, and 20 Rares to match the usual characters. It also has 2 basics and 1 token. New cards are unlikely, to not mess up the role or scaling. Has cards including the Silent.
Description
A fully developed retro character for Slay the Spire 2. Likely about as strong as the Ironclad. Created by @Shadow-jj6fm. — Made with the STS2 Character Creator
Expect a lot of toxin.
Shows in rest sites, ancient dialogue, and character select.
New updates or fixes will not ruin your compendium or save! <3
1 orb slot.
Installation instructions
1. Unzip this file. You will see two folders:
TheBiomexMod/ (this mod)
BaseLib/ (the modding library this mod is built on)
2. Copy BOTH folders into your Slay the Spire 2 mods folder:
Steam\steamapps\common\Slay the Spire 2\mods\
(create the mods folder if it isn't there yet). You should end
up with:
mods/
TheBiomexMod/
BaseLib/
3. Launch Slay the Spire 2. The first time you run mods, the game
shows a mod-loading warning — accept it, then enable both
BaseLib and TheBiomexMod in the in-game Mods menu and restart.
4. Your character appears on the character select screen.
Both folders are required. If BaseLib is already installed from
another mod, you can skip copying it — but keeping this copy is
safe (same version, it just overwrites).
Main features
I expect it to be moderately unbalanced but that's okay, this mod compiles several aspects of characters, creating a powerful acidic defending titan. They specialize in power stacking, defense, and poison.
New Playable Character: The Biomex, a retro pixel wanderer lost in a painted world.
60+ Custom Cards:
- Max HP‑sacrifice skills
- Block‑interaction attacks
- Power‑based scaling
- Unique recursion mechanics
Custom Relics: Including the Biomex Immunity, designed to heal poison.
Unique Mechanics:
- Cards that return when Block breaks
- Strength from defensive play
- Powers that snowball into late‑fight nukes
Custom Art:
- Pixel sprites
- Dozens of unique card portraits
English Localization
Recommended Playstyle
- Spam poison
- Defend quickly
- Remember energy exists
Requirements
BaseLib
BaseLib by Alchyr — https://github.com/Alchyr/BaseLib-StS2
Shout outs
Alchyr — GitHub - Alchyr/BaseLib-StS2: Mod for Slay the Spire 2 to standardize content additions · GitHub
Spencer — STS2 Character Mod Creator
MegaCrit — Mega Crit Games
The Great List of Cards:
Strike Defend
Venomous MawAttack · Common×The Silent's BaneSkill · Common×Fuming BiohazardPower · CommonPay The SilentSkill · CommonPoison GemSkill · UncommonToxic PrickPower · UncommonCorrosive DosePower · CommonVolatile SludgePower · CommonResidual VenomPower · CommonTail StabAttack · UncommonCataclysm EchoPower · RareTitrationPower · CommonSurface ContaminantPower · RarePathogenPower · CommonLickPower · UncommonAbiotic LockSkill · RareTail WhipAttack · UncommonTail ImpaleAttack · UncommonToxin MorningstarAttack · CommonTalk To Television ToddSkill · RarePoison OrbSkill · UncommonAcid OrbSkill · UncommonFryPower · RareTail BlockSkill · UncommonKeep BlockPower · UncommonCharge Your VialSkill · CommonEmpty Your VialSkill · CommonPurest HatredAttack · RareMakeshift HandgunAttack · RareSpore BarrierAttack · UncommonTrading CardAttack · UncommonVenom ClaymoreAttack · UncommonVicious PuddlesAttack · UncommonAxeAttack · UncommonSwampAttack · UncommonEvocationSkill · RareSterile ShieldSkill · RareBiohazard BraceSkill · CommonPower UpSkill · RareRadiation ExposureAttack · UncommonSample BagSkill · CommonPutrid HammerAttack · RarePoisonous Poison?Skill · UncommonChild's LoveSkill · RareQuakePower · RareTeeth of DoomAttack · RareRespawn ShardSkill · RareLong SliceAttack · CommonOverfocusSkill · UncommonVenn DiagramSkill · CommonSelf-SlimeSkill · UncommonLayered GuardSkill · RareFoamSkill · CommonGelatinous WallSkill · UncommonBottle of Living IceSkill · CommonHardenSkill · UncommonDriftSkill · RareBio-MechsSkill · RareSpore ProbeSkill · RareRaise ThornsPower · UncommonOrb of DecayPower · UncommonToxin ReservoirSkill · UncommonGrowSkill · CommonCircle of LifeSkill · CommonCause and EffectAttack · Rare
Starting Relic: Biomex Immunity - Reduce 12 poison when a card is played.