diff --git a/descriptions/Engine.HPL.md b/descriptions/Engine.HPL.md
new file mode 100644
index 000000000..b6f81282d
--- /dev/null
+++ b/descriptions/Engine.HPL.md
@@ -0,0 +1 @@
+[**HPL**](https://amnesia.fandom.com/wiki/HPL_Engine) is an [**Open source**](https://github.com/FrictionalGames/HPL1Engine) engine by [**Frictional Games**](https://frictionalgames.com), used in their games.
diff --git a/rules.ini b/rules.ini
index 71aab47dc..706bd6e3b 100644
--- a/rules.ini
+++ b/rules.ini
@@ -122,6 +122,7 @@ GZDoom[] = (?:^|/)gzdoom\.pk3$
 GZDoom[] = (?:^|/)gzdoom\.sf2$
 HaemimontSol = ^Local/English\.hpk$
 HashLink = (?:^|/)libhl\.(?:dll|so)$
+HPL = \.hps$
 idTech[] = (?:^|/)gl(?:quake|hexen)(?:$|/)
 idTech[] = (?:^|/)baseq2(?:$|/)
 idTech[] = \.pk4$
diff --git a/tests/types/Engine.HPL.txt b/tests/types/Engine.HPL.txt
new file mode 100644
index 000000000..5db9eb958
--- /dev/null
+++ b/tests/types/Engine.HPL.txt
@@ -0,0 +1 @@
+.hps
diff --git a/tests/types/_NonMatchingTests.txt b/tests/types/_NonMatchingTests.txt
index b60344447..77ec65e77 100644
--- a/tests/types/_NonMatchingTests.txt
+++ b/tests/types/_NonMatchingTests.txt
@@ -495,6 +495,7 @@ OpenImageDenoise
 fbnEngine.dl
 fbnEngine_dll
 bnEngine.dll
+.hpl
 _CommonRedist/FXNA/4.0/installscript.vdf
 FXNA/4.0/installscript.vdf
 PCTouchHelper.dl