TheBiomex Mod
🟡 Updated this yearPreview

🔍 Analysis
- 🏆 #733 of 749 Gameplay mods in this game by downloads
📋 About This Mod
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
TheBiomexMod/
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[/]
📊 Mod Details
- Game
- Slaythespire2 Mods
- Author
- shadoethedoe
- Version
- 1.1.0
- Downloads
- 7
- Endorsements
- 0
- Category
- Gameplay
- Created
- 7/31/2026
- Updated
- 7/31/2026
🔧 How to Install Slay The Spire II Mods
Download from Nexus Mods.
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