diff --git a/es-app/assets/Windows_Portable_README.txt b/es-app/assets/Windows_Portable_README.txt
index 1847ce163..099471ceb 100644
--- a/es-app/assets/Windows_Portable_README.txt
+++ b/es-app/assets/Windows_Portable_README.txt
@@ -90,6 +90,7 @@ Emulators\prboom-plus\prboom-plus.exe
 Emulators\PrimeHack\Dolphin.exe
 Emulators\Project64\Project64.exe
 Emulators\punes\punes64.exe
+Emulators\quasi88\QUASI88.exe
 Emulators\redream\redream.exe
 Emulators\RMG\RMG.exe
 Emulators\RPCS3\rpcs3.exe
diff --git a/resources/systems/macos/es_find_rules.xml b/resources/systems/macos/es_find_rules.xml
index fd6d24c27..70f65b7c5 100644
--- a/resources/systems/macos/es_find_rules.xml
+++ b/resources/systems/macos/es_find_rules.xml
@@ -225,6 +225,13 @@
             <entry>/Applications/PrBoom-Plus.app/Contents/MacOS/PrBoom-Plus</entry>
         </rule>
     </emulator>
+    <emulator name="QUASI88">
+        <!-- NEC PC-8800 series emulator QUASI88 -->
+        <rule type="staticpath">
+            <entry>/opt/homebrew/bin/quasi88</entry>
+            <entry>/usr/local/bin/quasi88</entry>
+        </rule>
+    </emulator>
     <emulator name="REDREAM">
         <!-- Sega Dreamcast emulator Redream -->
         <rule type="staticpath">
diff --git a/resources/systems/macos/es_systems.xml b/resources/systems/macos/es_systems.xml
index 87289fa74..0b519795f 100644
--- a/resources/systems/macos/es_systems.xml
+++ b/resources/systems/macos/es_systems.xml
@@ -1218,8 +1218,9 @@
         <name>pc88</name>
         <fullname>NEC PC-8800 Series</fullname>
         <path>%ROMPATH%/pc88</path>
-        <extension>.d88 .D88 .u88 .U88 .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.88d .88D .cmt .CMT .d88 .D88 .m3u .M3U .t88 .T88 .u88 .U88</extension>
         <command label="QUASI88">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/quasi88_libretro.dylib %ROM%</command>
+        <command label="QUASI88 (Standalone)">%EMULATOR_QUASI88% -romdir ~/.quasi88 %ROM%</command>
         <platform>pc88</platform>
         <theme>pc88</theme>
     </system>
diff --git a/resources/systems/unix/es_find_rules.xml b/resources/systems/unix/es_find_rules.xml
index 0eda11a9d..6cbfd0cc5 100644
--- a/resources/systems/unix/es_find_rules.xml
+++ b/resources/systems/unix/es_find_rules.xml
@@ -596,6 +596,18 @@
             <entry>~/bin/punes/punes</entry>
         </rule>
     </emulator>
+    <emulator name="QUASI88">
+        <!-- NEC PC-8800 series emulator QUASI88 -->
+        <rule type="systempath">
+            <entry>quasi88</entry>
+        </rule>
+        <rule type="staticpath">
+            <entry>~/Applications/quasi88/quasi88</entry>
+            <entry>~/.local/share/applications/quasi88/quasi88</entry>
+            <entry>~/.local/bin/quasi88/quasi88</entry>
+            <entry>~/bin/quasi88/quasi88</entry>
+        </rule>
+    </emulator>
     <emulator name="REDREAM">
         <!-- Sega Dreamcast emulator Redream -->
         <rule type="systempath">
diff --git a/resources/systems/unix/es_systems.xml b/resources/systems/unix/es_systems.xml
index 64efe9eae..81541da55 100644
--- a/resources/systems/unix/es_systems.xml
+++ b/resources/systems/unix/es_systems.xml
@@ -1269,8 +1269,9 @@
         <name>pc88</name>
         <fullname>NEC PC-8800 Series</fullname>
         <path>%ROMPATH%/pc88</path>
-        <extension>.d88 .D88 .u88 .U88 .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.88d .88D .cmt .CMT .d88 .D88 .m3u .M3U .t88 .T88 .u88 .U88</extension>
         <command label="QUASI88">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%/quasi88_libretro.so %ROM%</command>
+        <command label="QUASI88 (Standalone)">%EMULATOR_QUASI88% -romdir ~/.quasi88 %ROM%</command>
         <platform>pc88</platform>
         <theme>pc88</theme>
     </system>
diff --git a/resources/systems/windows/es_find_rules.xml b/resources/systems/windows/es_find_rules.xml
index d5fc08d3a..b585ec269 100644
--- a/resources/systems/windows/es_find_rules.xml
+++ b/resources/systems/windows/es_find_rules.xml
@@ -550,6 +550,16 @@
             <entry>%ESPATH%\..\Emulators\punes\punes64.exe</entry>
         </rule>
     </emulator>
+    <emulator name="QUASI88">
+        <!-- NEC PC-8800 series emulator QUASI88 -->
+        <rule type="systempath">
+            <entry>QUASI88.exe</entry>
+        </rule>
+        <rule type="staticpath">
+            <entry>%ESPATH%\Emulators\quasi88\QUASI88.exe</entry>
+            <entry>%ESPATH%\..\Emulators\quasi88\QUASI88.exe</entry>
+        </rule>
+    </emulator>
     <emulator name="REDREAM">
         <!-- Sega Dreamcast emulator Redream -->
         <rule type="systempath">
diff --git a/resources/systems/windows/es_find_rules_portable.xml b/resources/systems/windows/es_find_rules_portable.xml
index c3e2384c6..729f0666e 100644
--- a/resources/systems/windows/es_find_rules_portable.xml
+++ b/resources/systems/windows/es_find_rules_portable.xml
@@ -359,6 +359,13 @@
             <entry>%ESPATH%\..\Emulators\punes\punes64.exe</entry>
         </rule>
     </emulator>
+    <emulator name="QUASI88">
+        <!-- NEC PC-8800 series emulator QUASI88 -->
+        <rule type="staticpath">
+            <entry>%ESPATH%\Emulators\quasi88\QUASI88.exe</entry>
+            <entry>%ESPATH%\..\Emulators\quasi88\QUASI88.exe</entry>
+        </rule>
+    </emulator>
     <emulator name="REDREAM">
         <!-- Sega Dreamcast emulator Redream -->
         <rule type="staticpath">
diff --git a/resources/systems/windows/es_systems.xml b/resources/systems/windows/es_systems.xml
index e7e34c4b6..8788c3576 100644
--- a/resources/systems/windows/es_systems.xml
+++ b/resources/systems/windows/es_systems.xml
@@ -1264,8 +1264,9 @@
         <name>pc88</name>
         <fullname>NEC PC-8800 Series</fullname>
         <path>%ROMPATH%\pc88</path>
-        <extension>.d88 .D88 .u88 .U88 .m3u .M3U .7z .7Z .zip .ZIP</extension>
+        <extension>.88d .88D .cmt .CMT .d88 .D88 .m3u .M3U .t88 .T88 .u88 .U88</extension>
         <command label="QUASI88">%EMULATOR_RETROARCH% -L %CORE_RETROARCH%\quasi88_libretro.dll %ROM%</command>
+        <command label="QUASI88 (Standalone)">%EMULATOR_QUASI88% -romdir %EMUDIR%\ROM %ROM%</command>
         <platform>pc88</platform>
         <theme>pc88</theme>
     </system>