diff --git a/src/sfall_arrays.cc b/src/sfall_arrays.cc
index 0681f84..f7357a5 100644
--- a/src/sfall_arrays.cc
+++ b/src/sfall_arrays.cc
@@ -55,6 +55,8 @@ public:
     virtual ProgramValue GetArray(const ProgramValue& key) = 0;
     virtual void SetArray(const ProgramValue& key, const ProgramValue& val, bool allowUnset) = 0;
     virtual void ResizeArray(int newLen) = 0;
+    virtual ProgramValue ScanArray(const ProgramValue& value, ValueCompareStrings& cmp) = 0;
+
     virtual ~SFallArray() = default;
 };
 
@@ -127,6 +129,16 @@ public:
             ListSort(values, newLen, std::less<ProgramValue>());
         }
     }
+
+    ProgramValue ScanArray(const ProgramValue& value, ValueCompareStrings& cmp)
+    {
+        for (size_t i = 0; i < size(); i++) {
+            if (cmp(value, values[i])) {
+                return ProgramValue(i);
+            }
+        }
+        return ProgramValue(-1);
+    }
 };
 
 class SFallArrayAssoc : public SFallArray {
@@ -232,6 +244,16 @@ public:
             MapSort(newLen);
         }
     };
+
+    ProgramValue ScanArray(const ProgramValue& value, ValueCompareStrings& cmp)
+    {
+        for (const auto &pair : map) {            
+            if (cmp(pair.second, value)) {
+                return pair.first;
+            }
+        }
+        return ProgramValue(-1);
+    }
 };
 
 void SFallArrayAssoc::MapSort(int type)
@@ -389,4 +411,14 @@ int StackArray(const ProgramValue& key, const ProgramValue& val)
     return 0;
 }
 
+ProgramValue ScanArray(ArrayId array_id, const ProgramValue& val, ValueCompareStrings& cmp)
+{
+    auto arr = get_array_by_id(array_id);
+    if (!arr) {
+        return ProgramValue(-1);
+    };
+
+    return arr->ScanArray(val, cmp);
+}
+
 }
\ No newline at end of file
diff --git a/src/sfall_arrays.h b/src/sfall_arrays.h
index 1ee94c3..818b9f2 100644
--- a/src/sfall_arrays.h
+++ b/src/sfall_arrays.h
@@ -3,6 +3,7 @@
 
 #include "interpreter.h"
 #include "object.h"
+#include <functional>
 #include <cstdint>
 
 namespace fallout {
@@ -13,6 +14,8 @@ namespace fallout {
 
 using ArrayId = unsigned int;
 
+using ValueCompareStrings = const std::function<bool(const ProgramValue&, const ProgramValue&)>;
+
 ArrayId CreateArray(int len, uint32_t flags);
 ArrayId CreateTempArray(int len, uint32_t flags);
 ProgramValue GetArrayKey(ArrayId array_id, int index);
@@ -25,6 +28,7 @@ void ResizeArray(ArrayId array_id, int newLen);
 void DeleteAllTempArrays();
 void sfallArraysReset();
 int StackArray(const ProgramValue& key, const ProgramValue& val);
+ProgramValue ScanArray(ArrayId array_id, const ProgramValue& val, ValueCompareStrings& cmp);
 
 }
 #endif /* SFALL_ARRAYS */
\ No newline at end of file
diff --git a/src/sfall_opcodes.cc b/src/sfall_opcodes.cc
index 8ab43c6..c9a76bd 100644
--- a/src/sfall_opcodes.cc
+++ b/src/sfall_opcodes.cc
@@ -533,18 +533,37 @@ static void opSetArray(Program* program)
     SetArray(arrayId, key, value, true);
 }
 
-
 // arrayexpr
 static void opStackArray(Program* program)
 {
     auto value = programStackPopValue(program);
-    auto key = programStackPopValue(program);    
+    auto key = programStackPopValue(program);
     auto returnValue = StackArray(key, value);
     programStackPushInteger(program, returnValue);
 }
 
+// scan array
+static void opScanArray(Program* program)
+{
+    auto value = programStackPopValue(program);
+    auto arrayId = programStackPopInteger(program);
 
-
+    auto returnValue = ScanArray(arrayId, value, [&program](const ProgramValue& a, const ProgramValue& b) -> bool {
+        if (!a.isString()) {
+            return a == b;
+        };
+        if (!b.isString()) {
+            return false;
+        };
+        auto str1 = programGetString(program, a.opcode, a.integerValue);
+        auto str2 = programGetString(program, a.opcode, a.integerValue);
+        if (!str1 || !str2) {
+            return false;
+        };
+        return strcmp(str1, str2) == 0;
+    });
+    programStackPushValue(program, returnValue);
+}
 
 // get_array
 static void opGetArray(Program* program)
@@ -598,8 +617,8 @@ static void opPartyMemberList(Program* program)
 
 // type_of
 static void opTypeOf(Program* program)
-{    
-    auto value = programStackPopValue(program);    
+{
+    auto value = programStackPopValue(program);
     if (value.isInt()) {
         programStackPushInteger(program, 1);
     } else if (value.isFloat()) {
@@ -753,6 +772,7 @@ void sfallOpcodesInit()
     interpreterRegisterOpcode(0x8233, opFixArray);
     interpreterRegisterOpcode(0x8237, opParseInt);
     interpreterRegisterOpcode(0x8238, op_atof);
+    interpreterRegisterOpcode(0x8239, opScanArray);
     interpreterRegisterOpcode(0x824B, op_tile_under_cursor);
     interpreterRegisterOpcode(0x824F, opGetStringLength);
     interpreterRegisterOpcode(0x8253, opTypeOf);