diff --git a/descriptions/Engine.sandbox.md b/descriptions/Engine.sandbox.md
new file mode 100644
index 000000000..40426b01b
--- /dev/null
+++ b/descriptions/Engine.sandbox.md
@@ -0,0 +1 @@
+[**s&box**](https://sbox.game/) is an engine made by Facepunch, built on top of Valve's Source 2.
diff --git a/rules.ini b/rules.ini
index 480d737ed..846618425 100644
--- a/rules.ini
+++ b/rules.ini
@@ -182,6 +182,7 @@ RPG_Developer_Bakin = (?:^|/)bakinengine\.dll$
 S2_Engine_HD = (?:^|/)S2Core\.dll$
 SakanaGL[] = (?:^|/)sakanagl\.dll$
 SakanaGL[] = \.sxstorage$
+sandbox = ^sbox-standalone\.dll$
 Serious_Engine = (?:All|01|patch)\.gro$
 ShiVa3D = \.stk$
 Silk = ^packs/sli\.spk$
diff --git a/tests/types/Engine.sandbox.txt b/tests/types/Engine.sandbox.txt
new file mode 100644
index 000000000..f1e7f0cc3
--- /dev/null
+++ b/tests/types/Engine.sandbox.txt
@@ -0,0 +1 @@
+sbox-standalone.dll
diff --git a/tests/types/_NonMatchingTests.txt b/tests/types/_NonMatchingTests.txt
index 9a8475850..745b61b85 100644
--- a/tests/types/_NonMatchingTests.txt
+++ b/tests/types/_NonMatchingTests.txt
@@ -1364,3 +1364,5 @@ odin_dll
 libodin_so
 notodin.dll
 notlibodin.so
+notsbox-standalone.dll
+sbox-standaloneadll