diff --git a/README.md b/README.md
index 643b593..2fe3bd6 100644
--- a/README.md
+++ b/README.md
@@ -1942,6 +1942,7 @@ Note that Ruby is itself tainted; see [the Programming Languages section](#progr
 | Name | Last Untainted Version or Commit ID | Tags and Evidence | Alternative(s) |
 |---|:---:|---|---|
 | [Hanakai](https://hanakai.org) | [![Request for Help](./badges/request-for-help.svg)](#request-for-help) | [![Permissive AI policy](./badges/permissive-ai-policy-orange.svg)](#permissive-ai-policy) ([1](https://hanakai.org/ai-policy)) | [sinatra](https://sinatrarb.com) |
+| [Ruby 2D](https://github.com/ruby2d/ruby2d) | [`v0.12.1`](https://github.com/ruby2d/ruby2d/releases/tag/v0.12.1) | [![Permissive AI policy](./badges/permissive-ai-policy-orange.svg)](#permissive-ai-policy) ([1](https://github.com/ruby2d/ruby2d/blob/main/AGENTS.md))<br/>[![AI Functionality](./badges/ai-functionality.svg)](#ai-functionality) ([1](https://www.ruby2d.com/learn/agents/)) | [gosu](https://www.libgosu.org) |
 | [Ruby on Rails](https://rubyonrails.org) | [![Request for Help](./badges/request-for-help.svg)](#request-for-help) | [![Permissive AI policy](./badges/permissive-ai-policy-orange.svg)](#permissive-ai-policy) ([1](https://github.com/rails/rails/blob/main/AGENTS.md)) | [sinatra](https://sinatrarb.com) |
 
 ### Rust