diff --git a/src/main.rs b/src/main.rs
index fcc0a76..b4fb8fd 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -99,15 +99,59 @@ pub fn parse_script(
         }
         _ => {}
     }
+    let mut exts_builder = Vec::new();
     for builder in scripts::BUILDER.iter() {
         let exts = builder.extensions();
         for ext in exts {
             if filename.to_lowercase().ends_with(ext) {
-                let encoding = get_encoding(arg, builder);
-                return Ok((builder.build_script(filename, encoding, config)?, builder));
+                exts_builder.push(builder);
             }
         }
     }
+    let exts_builder = if exts_builder.is_empty() {
+        scripts::BUILDER.iter().collect::<Vec<_>>()
+    } else {
+        exts_builder
+    };
+    if exts_builder.len() == 1 {
+        let builder = exts_builder.first().unwrap();
+        let encoding = get_encoding(arg, builder);
+        return Ok((builder.build_script(filename, encoding, config)?, builder));
+    }
+    let mut buf = [0u8; 1024];
+    let mut size = 0;
+    if filename != "-" {
+        let mut f = std::fs::File::open(filename)?;
+        size = std::io::Read::read(&mut f, &mut buf)?;
+    }
+    let mut scores = Vec::new();
+    for builder in exts_builder.iter() {
+        if let Some(score) = builder.is_this_format(filename, &buf, size) {
+            scores.push((score, builder));
+        }
+    }
+    if scores.is_empty() {
+        return Err(anyhow::anyhow!("Unsupported script type"));
+    }
+    let max_score = scores.iter().map(|s| s.0).max().unwrap();
+    let mut best_builders = Vec::new();
+    for (score, builder) in scores.iter() {
+        if *score == max_score {
+            best_builders.push(builder);
+        }
+    }
+    if best_builders.len() == 1 {
+        let builder = best_builders.first().unwrap();
+        let encoding = get_encoding(arg, builder);
+        return Ok((builder.build_script(filename, encoding, config)?, builder));
+    }
+    if best_builders.len() > 1 {
+        eprintln!(
+            "Multiple script types found for {}: {:?}",
+            filename, best_builders
+        );
+        return Err(anyhow::anyhow!("Multiple script types found"));
+    }
     Err(anyhow::anyhow!("Unsupported script type"))
 }
 
diff --git a/src/scripts/base.rs b/src/scripts/base.rs
index 0ae2696..2182081 100644
--- a/src/scripts/base.rs
+++ b/src/scripts/base.rs
@@ -1,7 +1,7 @@
 use crate::types::*;
 use anyhow::Result;
 
-pub trait ScriptBuilder {
+pub trait ScriptBuilder: std::fmt::Debug {
     fn default_encoding(&self) -> Encoding;
 
     fn default_patched_encoding(&self) -> Encoding {
@@ -17,6 +17,10 @@ pub trait ScriptBuilder {
 
     fn extensions(&self) -> &'static [&'static str];
 
+    fn is_this_format(&self, _filename: &str, _buf: &[u8], _buf_len: usize) -> Option<u8> {
+        None
+    }
+
     fn script_type(&self) -> &'static ScriptType;
 }
 
diff --git a/src/scripts/bgi/script.rs b/src/scripts/bgi/script.rs
index 954982b..10ae4cb 100644
--- a/src/scripts/bgi/script.rs
+++ b/src/scripts/bgi/script.rs
@@ -4,6 +4,7 @@ use crate::types::*;
 use crate::utils::encoding::{decode_to_string, encode_string};
 use anyhow::Result;
 
+#[derive(Debug)]
 pub struct BGIScriptBuilder {}
 
 impl BGIScriptBuilder {
@@ -37,6 +38,13 @@ impl ScriptBuilder for BGIScriptBuilder {
     fn script_type(&self) -> &'static ScriptType {
         &ScriptType::BGI
     }
+
+    fn is_this_format(&self, _filename: &str, buf: &[u8], buf_len: usize) -> Option<u8> {
+        if buf_len > 28 && buf.starts_with(b"BurikoCompiledScriptVer1.00\0") {
+            return Some(255);
+        }
+        None
+    }
 }
 
 pub struct BGIScript {
diff --git a/src/scripts/circus/script.rs b/src/scripts/circus/script.rs
index efb4dda..6b21062 100644
--- a/src/scripts/circus/script.rs
+++ b/src/scripts/circus/script.rs
@@ -4,6 +4,7 @@ use crate::types::*;
 use crate::utils::encoding::{decode_to_string, encode_string};
 use anyhow::Result;
 
+#[derive(Debug)]
 pub struct CircusMesScriptBuilder {}
 
 impl CircusMesScriptBuilder {
diff --git a/src/scripts/escude/mod.rs b/src/scripts/escude/mod.rs
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/scripts/escude/mod.rs
@@ -0,0 +1 @@
+
diff --git a/src/scripts/mod.rs b/src/scripts/mod.rs
index a08a780..eaf5f8e 100644
--- a/src/scripts/mod.rs
+++ b/src/scripts/mod.rs
@@ -1,6 +1,7 @@
 pub mod base;
 pub mod bgi;
 pub mod circus;
+pub mod escude;
 
 pub use base::{Script, ScriptBuilder};