diff --git a/descriptions/Engine.Cave.md b/descriptions/Engine.Cave.md
new file mode 100644
index 000000000..e77a3bf8a
--- /dev/null
+++ b/descriptions/Engine.Cave.md
@@ -0,0 +1 @@
+[**Cave Engine**](https://unidaystudio.github.io/CaveEngine-Docs) is a 3D desktop Game Engine that is scriptable in Python.
diff --git a/rules.ini b/rules.ini
index 38d26e8a4..22ad08ec8 100644
--- a/rules.ini
+++ b/rules.ini
@@ -55,6 +55,7 @@ Buddha = ^Data/Config/User\.(?:cfg|lua)$
 Build = (?:^|/)buildlic\.txt$
 C4_Engine = (?:^|/)Data/C4(?:\.pak)?$
 CatSystem2 = ^cs2confx?\.dll$
+Cave = ^Content\.cave$
 ChoiceScript = (?:^|/)SteamChoiceScript-Info\.plist$
 ChromeEngine[] = (?:^|/)ChromEd\.exe$
 ChromeEngine[] = (?:^|/)ChromeEngine[0-9]\.dll$
diff --git a/tests/types/Engine.Cave.txt b/tests/types/Engine.Cave.txt
new file mode 100644
index 000000000..92c9a4245
--- /dev/null
+++ b/tests/types/Engine.Cave.txt
@@ -0,0 +1 @@
+Content.cave
diff --git a/tests/types/_NonMatchingTests.txt b/tests/types/_NonMatchingTests.txt
index a7c9eae0a..3a89c3439 100644
--- a/tests/types/_NonMatchingTests.txt
+++ b/tests/types/_NonMatchingTests.txt
@@ -185,6 +185,8 @@ awesomiumprocess.exe
 awesomium-process.exe
 awesomium-process_exe
 awesomium_processor.exe
+/Content.cave
+Contents.cave
 biter.dll
 Arbiter.dl
 Arbiter_dll