diff --git a/src/args.rs b/src/args.rs
index 96019e4..28781b7 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -160,6 +160,13 @@ pub enum Command {
         /// Output directory
         output: Option<String>,
     },
+    /// Create a new script file
+    Create {
+        /// Input script
+        input: String,
+        /// Output script file
+        output: Option<String>,
+    },
 }
 
 pub fn parse_args() -> Arg {
diff --git a/src/main.rs b/src/main.rs
index f29a5ab..8eeff02 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1043,6 +1043,47 @@ pub fn unpack_archive(
     Ok(types::ScriptResult::Ok)
 }
 
+pub fn create_file(input: &str, output: Option<&str>, arg: &args::Arg) -> anyhow::Result<()> {
+    let typ = match &arg.script_type {
+        Some(t) => t,
+        None => {
+            return Err(anyhow::anyhow!("No script type specified"));
+        }
+    };
+    let builder = scripts::BUILDER
+        .iter()
+        .find(|b| b.script_type() == typ)
+        .ok_or_else(|| anyhow::anyhow!("Unsupported script type"))?;
+
+    if !builder.can_create_file() {
+        return Err(anyhow::anyhow!(
+            "Script type {:?} does not support file creation",
+            typ
+        ));
+    }
+
+    let output = match output {
+        Some(output) => output.to_string(),
+        None => {
+            let mut pb = std::path::PathBuf::from(input);
+            let ext = builder.extensions().first().unwrap_or(&"unk");
+            pb.set_extension(ext);
+            if pb.to_string_lossy() == input {
+                pb.set_extension(format!("{}.{}", ext, ext));
+            }
+            pb.to_string_lossy().into_owned()
+        }
+    };
+
+    builder.create_file_filename(
+        input,
+        &output,
+        get_encoding(arg, builder),
+        get_output_encoding(arg),
+    )?;
+    Ok(())
+}
+
 lazy_static::lazy_static! {
     static ref COUNTER: utils::counter::Counter = utils::counter::Counter::new();
 }
@@ -1195,6 +1236,16 @@ fn main() {
                 }
             }
         }
+        args::Command::Create { input, output } => {
+            let re = create_file(input, output.as_ref().map(|s| s.as_str()), &arg);
+            if let Err(e) = re {
+                COUNTER.inc_error();
+                eprintln!("Error creating file: {}", e);
+                if arg.backtrace {
+                    eprintln!("Backtrace: {}", e.backtrace());
+                }
+            }
+        }
     }
     eprintln!("{}", std::ops::Deref::deref(&COUNTER));
 }
diff --git a/src/scripts/base.rs b/src/scripts/base.rs
index fba6d16..21ab892 100644
--- a/src/scripts/base.rs
+++ b/src/scripts/base.rs
@@ -79,6 +79,34 @@ pub trait ScriptBuilder: std::fmt::Debug {
             "This script type does not support creating an archive."
         ))
     }
+
+    fn can_create_file(&self) -> bool {
+        false
+    }
+
+    fn create_file<'a>(
+        &'a self,
+        _filename: &'a str,
+        _writer: Box<dyn WriteSeek + 'a>,
+        _encoding: Encoding,
+        _file_encoding: Encoding,
+    ) -> Result<()> {
+        Err(anyhow::anyhow!(
+            "This script type does not support creating directly."
+        ))
+    }
+
+    fn create_file_filename(
+        &self,
+        filename: &str,
+        output_filename: &str,
+        encoding: Encoding,
+        file_encoding: Encoding,
+    ) -> Result<()> {
+        let f = std::fs::File::create(output_filename)?;
+        let f = std::io::BufWriter::new(f);
+        self.create_file(filename, Box::new(f), encoding, file_encoding)
+    }
 }
 
 pub trait ArchiveContent {
diff --git a/src/scripts/bgi/bsi.rs b/src/scripts/bgi/bsi.rs
new file mode 100644
index 0000000..e06acfd
--- /dev/null
+++ b/src/scripts/bgi/bsi.rs
@@ -0,0 +1,156 @@
+use crate::ext::io::*;
+use crate::scripts::base::*;
+use crate::types::*;
+use crate::utils::encoding::{decode_to_string, encode_string};
+use anyhow::Result;
+use std::collections::BTreeMap;
+use std::ffi::CString;
+
+#[derive(Debug)]
+pub struct BGIBsiScriptBuilder {}
+
+impl BGIBsiScriptBuilder {
+    pub fn new() -> Self {
+        BGIBsiScriptBuilder {}
+    }
+}
+
+impl ScriptBuilder for BGIBsiScriptBuilder {
+    fn default_encoding(&self) -> Encoding {
+        Encoding::Utf8
+    }
+
+    fn build_script(
+        &self,
+        buf: Vec<u8>,
+        _filename: &str,
+        encoding: Encoding,
+        _archive_encoding: Encoding,
+        config: &ExtraConfig,
+    ) -> Result<Box<dyn Script>> {
+        Ok(Box::new(BGIBsiScript::new(buf, encoding, config)?))
+    }
+
+    fn extensions(&self) -> &'static [&'static str] {
+        &["_bsi"]
+    }
+
+    fn script_type(&self) -> &'static ScriptType {
+        &ScriptType::BGIBsi
+    }
+
+    fn can_create_file(&self) -> bool {
+        true
+    }
+
+    fn create_file<'a>(
+        &'a self,
+        filename: &'a str,
+        writer: Box<dyn WriteSeek + 'a>,
+        encoding: Encoding,
+        file_encoding: Encoding,
+    ) -> Result<()> {
+        create_file(filename, writer, encoding, file_encoding)
+    }
+}
+
+#[derive(Debug)]
+pub struct BGIBsiScript {
+    pub data: BTreeMap<String, BTreeMap<String, String>>,
+}
+
+impl BGIBsiScript {
+    pub fn new(buf: Vec<u8>, encoding: Encoding, _config: &ExtraConfig) -> Result<Self> {
+        let mut data = BTreeMap::new();
+        let mut reader = MemReader::new(buf);
+        let section_count = reader.read_u32()?;
+        for _ in 0..section_count {
+            let section_name = reader.read_cstring()?;
+            let section_name = decode_to_string(encoding, section_name.as_bytes())?;
+            let mut section_data = BTreeMap::new();
+            let entry_count = reader.read_u32()?;
+            for _ in 0..entry_count {
+                let key = reader.read_cstring()?;
+                let key = decode_to_string(encoding, key.as_bytes())?;
+                let value = reader.read_cstring()?;
+                let value = decode_to_string(encoding, value.as_bytes())?;
+                section_data.insert(key, value);
+            }
+            data.insert(section_name, section_data);
+        }
+        if !reader.is_eof() {
+            eprintln!(
+                "Warning: BGIBsiScript data not fully read, remaining bytes: {}",
+                reader.data.len() - reader.pos
+            );
+            crate::COUNTER.inc_warning();
+        }
+        Ok(BGIBsiScript { data })
+    }
+}
+
+impl Script for BGIBsiScript {
+    fn default_output_script_type(&self) -> OutputScriptType {
+        OutputScriptType::Custom
+    }
+
+    fn is_output_supported(&self, output: OutputScriptType) -> bool {
+        matches!(output, OutputScriptType::Custom)
+    }
+
+    fn default_format_type(&self) -> FormatOptions {
+        FormatOptions::None
+    }
+
+    fn custom_output_extension(&self) -> &'static str {
+        "json"
+    }
+
+    fn custom_export(&self, filename: &std::path::Path, encoding: Encoding) -> Result<()> {
+        let s = serde_json::to_string_pretty(&self.data)
+            .map_err(|e| anyhow::anyhow!("Failed to write BSI Map data to JSON: {}", e))?;
+        let mut writer = crate::utils::files::write_file(filename)?;
+        let s = encode_string(encoding, &s, false)?;
+        writer.write_all(&s)?;
+        writer.flush()?;
+        Ok(())
+    }
+
+    fn custom_import<'a>(
+        &'a self,
+        custom_filename: &'a str,
+        file: Box<dyn WriteSeek + 'a>,
+        encoding: Encoding,
+        output_encoding: Encoding,
+    ) -> Result<()> {
+        create_file(custom_filename, file, encoding, output_encoding)
+    }
+}
+
+fn create_file<'a>(
+    custom_filename: &'a str,
+    mut writer: Box<dyn WriteSeek + 'a>,
+    encoding: Encoding,
+    output_encoding: Encoding,
+) -> Result<()> {
+    let input = crate::utils::files::read_file(custom_filename)?;
+    let s = decode_to_string(output_encoding, &input)?;
+    let data: BTreeMap<String, BTreeMap<String, String>> = serde_json::from_str(&s)
+        .map_err(|e| anyhow::anyhow!("Failed to read BSI Map data from JSON: {}", e))?;
+    writer.write_u32(data.len() as u32)?;
+    for (section_name, section_data) in data {
+        let section_name_bytes = encode_string(encoding, &section_name, false)?;
+        let section_name = CString::new(section_name_bytes)?;
+        writer.write_cstring(&section_name)?;
+        writer.write_u32(section_data.len() as u32)?;
+        for (key, value) in section_data {
+            let key_bytes = encode_string(encoding, &key, false)?;
+            let key = CString::new(key_bytes)?;
+            writer.write_cstring(&key)?;
+            let value_bytes = encode_string(encoding, &value, false)?;
+            let value = CString::new(value_bytes)?;
+            writer.write_cstring(&value)?;
+        }
+    }
+    Ok(())
+}
diff --git a/src/scripts/bgi/mod.rs b/src/scripts/bgi/mod.rs
index 5b504d4..6a7cc61 100644
--- a/src/scripts/bgi/mod.rs
+++ b/src/scripts/bgi/mod.rs
@@ -1,2 +1,3 @@
+pub mod bsi;
 mod parser;
 pub mod script;
diff --git a/src/scripts/escude/list.rs b/src/scripts/escude/list.rs
index 9f31e01..7e18490 100644
--- a/src/scripts/escude/list.rs
+++ b/src/scripts/escude/list.rs
@@ -49,6 +49,20 @@ impl ScriptBuilder for EscudeBinListBuilder {
         }
         None
     }
+
+    fn can_create_file(&self) -> bool {
+        true
+    }
+
+    fn create_file<'a>(
+        &'a self,
+        filename: &'a str,
+        writer: Box<dyn WriteSeek + 'a>,
+        encoding: Encoding,
+        file_encoding: Encoding,
+    ) -> Result<()> {
+        create_file(filename, writer, encoding, file_encoding)
+    }
 }
 
 #[derive(Debug)]
@@ -257,6 +271,37 @@ impl EscudeBinList {
     }
 }
 
+fn create_file<'a>(
+    custom_filename: &'a str,
+    mut writer: Box<dyn WriteSeek + 'a>,
+    encoding: Encoding,
+    output_encoding: Encoding,
+) -> Result<()> {
+    let input = crate::utils::files::read_file(custom_filename)?;
+    let s = decode_to_string(output_encoding, &input)?;
+    let entries: Vec<ListEntry> = serde_json::from_str(&s)
+        .map_err(|e| anyhow::anyhow!("Failed to read Escude list from JSON: {}", e))?;
+    writer.write_all(b"LIST")?;
+    writer.write_u32(0)?; // Placeholder for size
+    let mut total_size = 0;
+    for entry in entries {
+        let cur_pos = writer.stream_position()?;
+        writer.write_u32(entry.id)?;
+        writer.write_u32(0)?; // Placeholder for size
+        entry.data.pack(&mut writer, false, encoding)?;
+        let end_pos = writer.stream_position()?;
+        let size = (end_pos - cur_pos - 8) as u32; // 8 bytes for id and size
+        writer.seek(std::io::SeekFrom::Start(cur_pos + 4))?; // Seek to size position
+        writer.write_u32(size)?;
+        writer.seek(std::io::SeekFrom::Start(end_pos))?; // Seek to end
+        total_size += size + 8;
+    }
+    writer.seek(std::io::SeekFrom::Start(4))?; // Seek back to size position
+    writer.write_u32(total_size)?;
+    writer.flush()?;
+    Ok(())
+}
+
 impl Script for EscudeBinList {
     fn default_output_script_type(&self) -> OutputScriptType {
         OutputScriptType::Custom
@@ -287,33 +332,11 @@ impl Script for EscudeBinList {
     fn custom_import<'a>(
         &'a self,
         custom_filename: &'a str,
-        mut writer: Box<dyn WriteSeek + 'a>,
+        writer: Box<dyn WriteSeek + 'a>,
         encoding: Encoding,
         output_encoding: Encoding,
     ) -> Result<()> {
-        let input = crate::utils::files::read_file(custom_filename)?;
-        let s = decode_to_string(output_encoding, &input)?;
-        let entries: Vec<ListEntry> = serde_json::from_str(&s)
-            .map_err(|e| anyhow::anyhow!("Failed to read Escude list from JSON: {}", e))?;
-        writer.write_all(b"LIST")?;
-        writer.write_u32(0)?; // Placeholder for size
-        let mut total_size = 0;
-        for entry in entries {
-            let cur_pos = writer.stream_position()?;
-            writer.write_u32(entry.id)?;
-            writer.write_u32(0)?; // Placeholder for size
-            entry.data.pack(&mut writer, false, encoding)?;
-            let end_pos = writer.stream_position()?;
-            let size = (end_pos - cur_pos - 8) as u32; // 8 bytes for id and size
-            writer.seek(std::io::SeekFrom::Start(cur_pos + 4))?; // Seek to size position
-            writer.write_u32(size)?;
-            writer.seek(std::io::SeekFrom::Start(end_pos))?; // Seek to end
-            total_size += size + 8;
-        }
-        writer.seek(std::io::SeekFrom::Start(4))?; // Seek back to size position
-        writer.write_u32(total_size)?;
-        writer.flush()?;
-        Ok(())
+        create_file(custom_filename, writer, encoding, output_encoding)
     }
 }
 
diff --git a/src/scripts/mod.rs b/src/scripts/mod.rs
index 7671a31..7ca682f 100644
--- a/src/scripts/mod.rs
+++ b/src/scripts/mod.rs
@@ -14,6 +14,8 @@ lazy_static::lazy_static! {
         Box::new(circus::script::CircusMesScriptBuilder::new()),
         #[cfg(feature = "bgi")]
         Box::new(bgi::script::BGIScriptBuilder::new()),
+        #[cfg(feature = "bgi")]
+        Box::new(bgi::bsi::BGIBsiScriptBuilder::new()),
         #[cfg(feature = "escude-arc")]
         Box::new(escude::archive::EscudeBinArchiveBuilder::new()),
         #[cfg(feature = "escude")]
diff --git a/src/types.rs b/src/types.rs
index 17c22a2..178b869 100644
--- a/src/types.rs
+++ b/src/types.rs
@@ -209,6 +209,10 @@ pub enum ScriptType {
     #[value(alias("ethornell"))]
     /// Buriko General Interpreter/Ethornell Script
     BGI,
+    #[cfg(feature = "bgi")]
+    #[value(alias("ethornell-bsi"))]
+    /// Buriko General Interpreter/Ethornell bsi script (._bsi)
+    BGIBsi,
     #[cfg(feature = "escude-arc")]
     /// Escude bin archive
     EscudeArc,