diff --git a/README.md b/README.md
index 2a10aaf..6dab426 100644
--- a/README.md
+++ b/README.md
@@ -66,7 +66,7 @@ Full shader graph support.
 
 ## Used By
 
-- [Project Castle]()
+- [Project Castle](https://store.steampowered.com/app/1517150/Project_Castle/)
 
 ## LICENSE