diff --git a/resources/systems/macos/es_find_rules.xml b/resources/systems/macos/es_find_rules.xml
index 4d2f49331..3a41b5b6d 100644
--- a/resources/systems/macos/es_find_rules.xml
+++ b/resources/systems/macos/es_find_rules.xml
@@ -182,6 +182,12 @@
             <entry>/Applications/Snes9x.app/Contents/MacOS/Snes9x</entry>
         </rule>
     </emulator>
+    <emulator name="STEAM">
+        <!-- Valve Steam -->
+        <rule type="staticpath">
+            <entry>/Applications/Steam.app/Contents/MacOS/steam_osx</entry>
+        </rule>
+    </emulator>
     <emulator name="VBA-M">
         <!-- Nintendo Game Boy Advance emulator VBA-M -->
         <rule type="staticpath">
diff --git a/resources/systems/unix/es_find_rules.xml b/resources/systems/unix/es_find_rules.xml
index 8fa5a77e2..02a0eb122 100644
--- a/resources/systems/unix/es_find_rules.xml
+++ b/resources/systems/unix/es_find_rules.xml
@@ -371,6 +371,12 @@
             <entry>~/.local/share/flatpak/exports/bin/com.snes9x.Snes9x</entry>
         </rule>
     </emulator>
+    <emulator name="STEAM">
+        <!-- Valve Steam -->
+        <rule type="systempath">
+            <entry>steam</entry>
+        </rule>
+    </emulator>
     <emulator name="RYUJINX">
         <!-- Nintendo Switch emulator Ryujinx -->
         <rule type="systempath">
diff --git a/resources/systems/windows/es_find_rules.xml b/resources/systems/windows/es_find_rules.xml
index 95099f709..3529dae8f 100644
--- a/resources/systems/windows/es_find_rules.xml
+++ b/resources/systems/windows/es_find_rules.xml
@@ -399,6 +399,19 @@
             <entry>%ESPATH%\..\snes9x\snes9x-x64.exe</entry>
         </rule>
     </emulator>
+    <emulator name="STEAM">
+        <!-- Valve Steam -->
+        <rule type="winregistryvalue">
+            <entry>SOFTWARE\Valve\Steam\SteamExe</entry>
+        </rule>
+        <rule type="systempath">
+            <entry>steam.exe</entry>
+        </rule>
+        <rule type="staticpath">
+            <entry>C:\Program Files (x86)\Steam\steam.exe</entry>
+            <entry>D:\Program Files (x86)\Steam\steam.exe</entry>
+        </rule>
+    </emulator>
     <emulator name="SUPERMODEL">
         <!-- Sega Model 3 emulator Supermodel -->
         <rule type="systempath">
diff --git a/resources/systems/windows/es_find_rules_portable.xml b/resources/systems/windows/es_find_rules_portable.xml
index ea091655c..6a3d5b0c7 100644
--- a/resources/systems/windows/es_find_rules_portable.xml
+++ b/resources/systems/windows/es_find_rules_portable.xml
@@ -261,6 +261,19 @@
             <entry>%ESPATH%\..\snes9x\snes9x-x64.exe</entry>
         </rule>
     </emulator>
+    <emulator name="STEAM">
+        <!-- Valve Steam -->
+        <rule type="winregistryvalue">
+            <entry>SOFTWARE\Valve\Steam\SteamExe</entry>
+        </rule>
+        <rule type="systempath">
+            <entry>steam.exe</entry>
+        </rule>
+        <rule type="staticpath">
+            <entry>C:\Program Files (x86)\Steam\steam.exe</entry>
+            <entry>D:\Program Files (x86)\Steam\steam.exe</entry>
+        </rule>
+    </emulator>
     <emulator name="SUPERMODEL">
         <!-- Sega Model 3 emulator Supermodel -->
         <rule type="staticpath">