diff --git a/assets_generation/resources/asm/opcodes.yml b/assets_generation/resources/asm/opcodes.yml
index 1e0aee7a..c2c01eba 100644
--- a/assets_generation/resources/asm/opcodes.yml
+++ b/assets_generation/resources/asm/opcodes.yml
@@ -1987,6 +1987,23 @@ opcodes:
             doc: Floor ID.
             access: read
 
+  - code: 0xf829
+    mnemonic: get_num_kills
+    doc: Returns the number of enemies a player has killed during the quest.
+    params:
+      - type: reg_tup_ref
+        reg_tup:
+          - type: dword
+            doc: Player slot.
+            access: read
+      - type: any
+        doc: Unused
+      - type: reg_tup_ref
+        reg_tup:
+          - type: dword
+            doc: Result register.
+            access: write
+
   - code: 0xf82b
     mnemonic: unlock_door2
     params: [{ type: dword }, { type: dword }]
diff --git a/src/core/data_formats/asm/opcodes.ts b/src/core/data_formats/asm/opcodes.ts
index 522795d3..4bf85f93 100644
--- a/src/core/data_formats/asm/opcodes.ts
+++ b/src/core/data_formats/asm/opcodes.ts
@@ -3698,12 +3698,12 @@ export const OP_GO_FLOOR = (OPCODES[0xf828] = new_opcode(
     ],
     undefined,
 ));
-export const OP_UNKNOWN_F829 = (OPCODES[0xf829] = new_opcode(
+export const OP_GET_NUM_KILLS = (OPCODES[0xf829] = new_opcode(
     0xf829,
-    "unknown_f829",
-    undefined,
-    [],
-    undefined,
+    "get_num_kills",
+    "Returns the number of enemies a player has killed during the quest.",
+    [new_param({ kind: Kind.RegTupRef, register_tuples: [new_param(TYPE_DWORD, "Player slot.", ParamAccess.Read)] }, undefined, undefined), new_param(TYPE_ANY, "Unused", undefined), new_param({ kind: Kind.RegTupRef, register_tuples: [new_param(TYPE_DWORD, "Result register.", ParamAccess.Write)] }, undefined, undefined)],
+    undefined
 ));
 export const OP_UNKNOWN_F82A = (OPCODES[0xf82a] = new_opcode(
     0xf82a,