diff --git a/src/mercury_engine_data_structures/formats/__init__.py b/src/mercury_engine_data_structures/formats/__init__.py
index 37ba59b..db620df 100644
--- a/src/mercury_engine_data_structures/formats/__init__.py
+++ b/src/mercury_engine_data_structures/formats/__init__.py
@@ -28,6 +28,7 @@
 from mercury_engine_data_structures.formats.bmsmd import Bmsmd
 from mercury_engine_data_structures.formats.bmsmsd import Bmsmsd
 from mercury_engine_data_structures.formats.bmsnav import Bmsnav
+from mercury_engine_data_structures.formats.bmssa import Bmssa
 from mercury_engine_data_structures.formats.bmssd import Bmssd
 from mercury_engine_data_structures.formats.bmtre import Bmtre
 from mercury_engine_data_structures.formats.bmtun import Bmtun
@@ -68,6 +69,7 @@
     "BMMDEF": Bmmdef,
     "BMSBK": Bmsbk,
     "BMSCP": Bmscp,
+    "BMSSA": Bmssa,
     "BMSSD": Bmssd,
     "BMSSH": Bmssh,
     "BMSSK": Bmssk,
diff --git a/src/mercury_engine_data_structures/formats/bmssa.py b/src/mercury_engine_data_structures/formats/bmssa.py
new file mode 100644
index 0000000..41369fe
--- /dev/null
+++ b/src/mercury_engine_data_structures/formats/bmssa.py
@@ -0,0 +1,49 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from construct.core import (
+    Const,
+    Flag,
+    Struct,
+    Terminated,
+)
+
+from mercury_engine_data_structures.base_resource import BaseResource
+from mercury_engine_data_structures.common_types import StrId, VersionAdapter, make_dict, make_vector
+
+if TYPE_CHECKING:
+    from construct import Construct
+
+    from mercury_engine_data_structures.game_check import Game
+
+Camera_Subarea_Setup = Struct(
+    "environment_preset" / StrId, # bmsev
+    "sound" / StrId, # bmses
+
+    # the following 3 are almost always none, possibly extra groups?
+    "unk2" / StrId, # lg or eg, only used in cockpit/credits scenarios
+    "entity_group" / StrId,
+    "block_group" / StrId,
+
+    "cc_names" / make_vector(StrId),
+    "actors_in_scenario" / make_vector(StrId),
+    "cutscenes" / make_vector(StrId), # bmscu files
+    "collision_layer" / StrId, # bmscd: entry in collision_layer
+    "unk9" / Flag,
+)  # fmt: skip
+
+CollisionCamera = Struct("setups" / make_dict(Camera_Subarea_Setup))
+
+BMSSA = Struct(
+    "_magic" / Const(b"MSSA"),
+    "version" / VersionAdapter("1.22.0"),
+    "cameras" / make_dict(CollisionCamera),
+    Terminated,
+)
+
+
+class Bmssa(BaseResource):
+    @classmethod
+    def construct_class(cls, target_game: Game) -> Construct:
+        return BMSSA
diff --git a/tests/formats/test_bmssa.py b/tests/formats/test_bmssa.py
new file mode 100644
index 0000000..dce0046
--- /dev/null
+++ b/tests/formats/test_bmssa.py
@@ -0,0 +1,12 @@
+from __future__ import annotations
+
+import pytest
+from tests.test_lib import parse_build_compare_editor_parsed
+
+from mercury_engine_data_structures import samus_returns_data
+from mercury_engine_data_structures.formats.bmssa import Bmssa
+
+
+@pytest.mark.parametrize("bmssa_path", samus_returns_data.all_files_ending_with(".bmssa"))
+def test_compare_bmssa_msr(samus_returns_tree, bmssa_path):
+    parse_build_compare_editor_parsed(Bmssa, samus_returns_tree, bmssa_path)