diff --git a/src/nutcracker/sputm/windex/compiler.py b/src/nutcracker/sputm/windex/compiler.py
new file mode 100644
index 0000000..2efa572
--- /dev/null
+++ b/src/nutcracker/sputm/windex/compiler.py
@@ -0,0 +1,52 @@
+from __future__ import annotations
+
+import re
+from pathlib import Path
+
+from nutcracker.sputm.script.opcodes_v5 import Variable
+
+BREAK_OPCODE = 0x80
+INCREMENT_OPCODE = 0x46
+DECREMENT_OPCODE = 0xC6
+
+_VAR_RE = re.compile(r'([VLB])\.(\d+)')
+
+
+def parse_variable(token: str) -> Variable:
+    match = _VAR_RE.fullmatch(token)
+    if not match:
+        raise ValueError(token)
+    prefix, num = match.groups()
+    base = {
+        'V': 0,
+        'L': 0x4000,
+        'B': 0x8000,
+    }[prefix]
+    return Variable(base + int(num))
+
+
+def compile_line(line: str) -> bytes:
+    line = line.strip()
+    if not line or line.startswith((';', 'room')):
+        return b''
+    if line.startswith('break-here'):
+        parts = line.split()
+        count = int(parts[1]) if len(parts) > 1 else 1
+        return bytes([BREAK_OPCODE] * count)
+    inc = re.match(r'^\+\+(\S+)$', line)
+    if inc:
+        var = parse_variable(inc.group(1))
+        return bytes([INCREMENT_OPCODE]) + var.to_bytes()
+    dec = re.match(r'^--(\S+)$', line)
+    if dec:
+        var = parse_variable(dec.group(1))
+        return bytes([DECREMENT_OPCODE]) + var.to_bytes()
+    raise NotImplementedError(f'Unsupported statement: {line}')
+
+
+def compile_scu(path: Path) -> bytes:
+    target = Path(path)
+    data = bytearray()
+    for line in target.read_text().splitlines():
+        data += compile_line(line)
+    return bytes(data)
diff --git a/src/nutcracker/sputm/windex/runner.py b/src/nutcracker/sputm/windex/runner.py
index 2b59576..f548930 100644
--- a/src/nutcracker/sputm/windex/runner.py
+++ b/src/nutcracker/sputm/windex/runner.py
@@ -12,6 +12,7 @@
 from ..strings import RAW_ENCODING
 from ..tree import narrow_schema, open_game_resource
 from .scu import dump_script_file
+from .compiler import compile_scu
 
 app = typer.Typer()
 
@@ -97,17 +98,28 @@ def decompile(
 
     for disk in root:
         for room in sputm.findall('LFLF', disk):
-            room_no = rnam.get(room.attribs['gid'], f"room_{room.attribs['gid']}")
+            room_no = rnam.get(room.attribs['gid'], f'room_{room.attribs["gid"]}')
             print(
                 '==========================',
                 room.attribs['path'],
                 room_no,
             )
-            fname = f"{script_dir}/{room.attribs['gid']:04d}_{room_no}.scu"
+            fname = f'{script_dir}/{room.attribs["gid"]:04d}_{room_no}.scu'
 
             with open(fname, 'w', **RAW_ENCODING) as script_file:
                 dump_script_file(room_no, room, decompile, script_file)
 
 
+@app.command('compile')
+def compile(
+    script: Path = typer.Argument(..., help='Windex .scu script to compile'),
+    output: Path = typer.Option(None, '--out', '-o', help='Target binary file'),
+) -> None:
+    """Compile a Windex .scu script to raw bytecode."""
+    data = compile_scu(script)
+    out = output or script.with_suffix('.bin')
+    out.write_bytes(data)
+
+
 if __name__ == '__main__':
     app()