diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..124759c
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "user-apps/doom/doomgeneric"]
+	path = user-apps/doom/doomgeneric
+	url = https://github.com/ozkl/doomgeneric
diff --git a/Cargo.lock b/Cargo.lock
index 88f54ea..7059bd5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -133,6 +133,26 @@ version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
+[[package]]
+name = "bindgen"
+version = "0.71.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5f58bf3d7db68cfbac37cfc485a8d711e87e064c3d0fe0435b92f7a407f9d6b3"
+dependencies = [
+ "bitflags 2.9.4",
+ "cexpr",
+ "clang-sys",
+ "itertools 0.10.5",
+ "log",
+ "prettyplease",
+ "proc-macro2",
+ "quote",
+ "regex",
+ "rustc-hash",
+ "shlex",
+ "syn 2.0.104",
+]
+
 [[package]]
 name = "bit-set"
 version = "0.5.3"
@@ -275,12 +295,42 @@ dependencies = [
  "toml",
 ]
 
+[[package]]
+name = "cc"
+version = "1.2.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "739eb0f94557554b3ca9a86d2d37bebd49c5e6d0c1d2bda35ba5bdac830befc2"
+dependencies = [
+ "find-msvc-tools",
+ "shlex",
+]
+
+[[package]]
+name = "cexpr"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6fac387a98bb7c37292057cffc56d62ecb629900026402633ae9160df93a8766"
+dependencies = [
+ "nom",
+]
+
 [[package]]
 name = "cfg-if"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9555578bc9e57714c812a1f84e4fc5b4d21fcb063490c624de019f7464c91268"
 
+[[package]]
+name = "clang-sys"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b023947811758c97c59bf9d1c188fd619ad4718dcaa767947df1cadb14f39f4"
+dependencies = [
+ "glob",
+ "libc",
+ "libloading",
+]
+
 [[package]]
 name = "clap"
 version = "3.2.25"
@@ -564,6 +614,16 @@ dependencies = [
  "litrs",
 ]
 
+[[package]]
+name = "doom"
+version = "0.1.0"
+dependencies = [
+ "abi",
+ "bindgen",
+ "cc",
+ "embedded-graphics",
+]
+
 [[package]]
 name = "either"
 version = "1.15.0"
@@ -1107,6 +1167,12 @@ version = "2.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
+[[package]]
+name = "find-msvc-tools"
+version = "0.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52051878f80a721bb68ebfbc930e07b65ba72f2da88968ea5c06fd6ca3d3a127"
+
 [[package]]
 name = "fixed"
 version = "1.29.0"
@@ -1292,6 +1358,12 @@ dependencies = [
  "tinygif",
 ]
 
+[[package]]
+name = "glob"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0cc23270f6e1808e30a928bdc84dea0b9b4136a8bc82338574f23baf47bbd280"
+
 [[package]]
 name = "goblin"
 version = "0.10.2"
@@ -1604,6 +1676,16 @@ version = "0.2.174"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"
 
+[[package]]
+name = "libloading"
+version = "0.8.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7c4b02199fee7c5d21a5ae7d8cfa79a6ef5bb2fc834d6e9058e89c825efdc55"
+dependencies = [
+ "cfg-if",
+ "windows-link",
+]
+
 [[package]]
 name = "libredox"
 version = "0.1.4"
@@ -1660,6 +1742,12 @@ version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3c8dda44ff03a2f238717214da50f65d5a53b45cd213a7370424ffdb6fae815"
 
+[[package]]
+name = "minimal-lexical"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
+
 [[package]]
 name = "nb"
 version = "0.1.3"
@@ -1681,6 +1769,16 @@ version = "1.0.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "650eef8c711430f1a879fdd01d4745a7deea475becfb90269c06775983bbf086"
 
+[[package]]
+name = "nom"
+version = "7.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d273983c5a657a70a3e8f2a01329822f3b8c8172b73826411a55751e404a0a4a"
+dependencies = [
+ "memchr",
+ "minimal-lexical",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.19"
@@ -1944,6 +2042,16 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
 
+[[package]]
+name = "prettyplease"
+version = "0.2.36"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff24dfcda44452b9816fff4cd4227e1bb73ff5a2f1bc1105aa92fb8565ce44d2"
+dependencies = [
+ "proc-macro2",
+ "syn 2.0.104",
+]
+
 [[package]]
 name = "proc-macro-error"
 version = "1.0.4"
@@ -2136,6 +2244,12 @@ dependencies = [
  "crc-any",
 ]
 
+[[package]]
+name = "rustc-hash"
+version = "2.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "357703d41365b4b27c590e3ed91eabb1b663f07c4c084095e60cbed4362dff0d"
+
 [[package]]
 name = "rustc_version"
 version = "0.2.3"
@@ -2265,6 +2379,12 @@ dependencies = [
  "keccak",
 ]
 
+[[package]]
+name = "shlex"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
+
 [[package]]
 name = "siphasher"
 version = "1.0.1"
@@ -2833,6 +2953,12 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows-link"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
+
 [[package]]
 name = "windows-sys"
 version = "0.59.0"
diff --git a/Cargo.toml b/Cargo.toml
index 9e88380..768b290 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,6 +8,7 @@ members = [
   "user-apps/snake",
   "user-apps/gallery",
   "user-apps/gif",
+  "user-apps/doom",
 ]
 
 [profile.release]
diff --git a/user-apps/doom/Cargo.toml b/user-apps/doom/Cargo.toml
new file mode 100644
index 0000000..4e57be3
--- /dev/null
+++ b/user-apps/doom/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "doom"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+abi = { path = "../../abi" }
+embedded-graphics = "0.8.1"
+
+[build-dependencies]
+bindgen = "0.71.0"
+cc = "1.0"
diff --git a/user-apps/doom/build.rs b/user-apps/doom/build.rs
new file mode 100644
index 0000000..6342e96
--- /dev/null
+++ b/user-apps/doom/build.rs
@@ -0,0 +1,70 @@
+//! This build script copies the `memory.x` file from the crate root into
+//! a directory where the linker can always find it at build time.
+//! For many projects this is optional, as the linker always searches the
+//! project root directory -- wherever `Cargo.toml` is. However, if you
+//! are using a workspace or have a more complicated build setup, this
+//! build script becomes required. Additionally, by requesting that
+//! Cargo re-run the build script whenever `memory.x` is changed,
+//! updating `memory.x` ensures a rebuild of the application with the
+//! new memory settings.
+
+use std::env;
+use std::fs::File;
+use std::io::Write;
+use std::path::PathBuf;
+
+fn main() {
+    // Put `memory.x` in our output directory and ensure it's
+    // on the linker search path.
+    let out = &PathBuf::from(env::var_os("OUT_DIR").unwrap());
+    File::create(out.join("memory.x"))
+        .unwrap()
+        .write_all(include_bytes!("../memory.x"))
+        .unwrap();
+    println!("cargo:rustc-link-search={}", out.display());
+
+    println!("cargo:rerun-if-changed=memory.x");
+    println!("cargo:rustc-link-arg-bins=-Tmemory.x");
+
+    let ref dg_src_dir = std::path::PathBuf::from("doomgeneric/doomgeneric");
+    let mut dg_c_paths = vec![];
+    let mut dg_h_paths = vec![];
+
+    // Find most c and h files
+    for entry in std::fs::read_dir(dg_src_dir).unwrap() {
+        let entry = entry.unwrap();
+        if let Some(filename) = entry.file_name().to_str() {
+            if filename.starts_with("doomgeneric")
+                || filename.contains("_allegro")
+                || filename.contains("_sdl")
+                || filename == "i_main.c"
+            {
+                continue;
+            }
+
+            if filename.ends_with(".h") {
+                dg_h_paths.push(dg_src_dir.join(filename));
+            } else if filename.ends_with(".c") {
+                dg_c_paths.push(dg_src_dir.join(filename));
+            }
+        }
+    }
+    dg_c_paths
+        .iter()
+        .chain(dg_h_paths.iter())
+        .for_each(|path| println!("cargo:rerun-if-changed={}", path.to_str().unwrap()));
+
+    cc::Build::new()
+        .flag("-w") // silence warnings
+        .flag("-Os") // optimize for size
+        .define("CMAP256", None)
+        .define("DOOMGENERIC_RESX", Some("320"))
+        .define("DOOMGENERIC_RESY", Some("200"))
+        .define("MAXPLAYERS", Some("1"))
+        .flag_if_supported("-std=gnu89") // old-style C, allows implicit int
+        .flag("-Wno-implicit-function-declaration") // ignore missing prototypes
+        .define("_POSIX_C_SOURCE", Some("200809L"))
+        .files(dg_c_paths)
+        .include(".")
+        .compile("doomgeneric");
+}
diff --git a/user-apps/doom/doomgeneric b/user-apps/doom/doomgeneric
new file mode 160000
index 0000000..fc60163
--- /dev/null
+++ b/user-apps/doom/doomgeneric
@@ -0,0 +1 @@
+Subproject commit fc601639494e089702a1ada082eb51aaafc03722
diff --git a/user-apps/doom/inttypes.h b/user-apps/doom/inttypes.h
new file mode 100644
index 0000000..d2edacc
--- /dev/null
+++ b/user-apps/doom/inttypes.h
@@ -0,0 +1,4 @@
+#ifndef INTTYPES_H
+#define INTTYPES_H
+
+#endif
diff --git a/user-apps/doom/limits.h b/user-apps/doom/limits.h
new file mode 100644
index 0000000..9ef223e
--- /dev/null
+++ b/user-apps/doom/limits.h
@@ -0,0 +1,4 @@
+#ifndef STRINGS_H
+#define STRINGS_H
+
+#endif
diff --git a/user-apps/doom/src/doom.rs b/user-apps/doom/src/doom.rs
new file mode 100644
index 0000000..13cc7f6
--- /dev/null
+++ b/user-apps/doom/src/doom.rs
@@ -0,0 +1,55 @@
+const X: usize = 320;
+const Y: usize = 200;
+const SIZE: usize = X * Y;
+
+pub static mut DISPLAY: Option<SimulatorDisplay<Rgb565>> = None;
+pub static mut SCREEN_BUFFER: ScreenBuffer<X, Y, SIZE> = ScreenBuffer::new();
+pub static mut START: Option<Instant> = None;
+
+#[unsafe(no_mangle)]
+extern "C" fn DG_DrawFrame() {
+    let palette565: [Rgb565; 256] = unsafe {
+        colors.map(|c| {
+            Rgb565::new(
+                ((c.r as u16 * 31) / 255) as u8, // red 5 bits
+                ((c.g as u16 * 63) / 255) as u8, // green 6 bits
+                ((c.b as u16 * 31) / 255) as u8, // blue 5 bits
+            )
+        })
+    };
+    let buf = unsafe { &SCREEN_BUFFER.0 };
+
+    let display = unsafe { DISPLAY.as_mut().unwrap() };
+    display.clear(Rgb565::BLACK).unwrap();
+
+    for y in 0..Y {
+        for x in 0..X {
+            let idx = y * X + x;
+            let color = palette565[buf[idx] as usize];
+
+            Pixel(Point::new(x as i32, y as i32), color)
+                .draw(display)
+                .unwrap();
+        }
+    }
+}
+
+#[unsafe(no_mangle)]
+extern "C" fn DG_GetTicksMs() -> u32 {
+    let start = unsafe { START.unwrap() };
+    Instant::now()
+        .duration_since(start)
+        .as_millis()
+        .try_into()
+        .expect("Cannot Fit Start time into u32")
+}
+
+#[unsafe(no_mangle)]
+extern "C" fn DG_GetKey(pressed: *mut raw::c_int, key: *mut raw::c_uchar) -> raw::c_int {
+    0
+}
+
+#[unsafe(no_mangle)]
+extern "C" fn DG_SleepMs(ms: u32) {
+    sleep(Duration::from_millis(ms as u64));
+}
diff --git a/user-apps/doom/src/main.rs b/user-apps/doom/src/main.rs
new file mode 100644
index 0000000..613849c
--- /dev/null
+++ b/user-apps/doom/src/main.rs
@@ -0,0 +1,30 @@
+#![no_std]
+#![no_main]
+
+extern crate alloc;
+use abi::{
+    display::Display,
+    fs::{file_len, read_file},
+    get_key, get_ms,
+    keyboard::{KeyCode, KeyState},
+    print, sleep,
+};
+use alloc::vec;
+use core::panic::PanicInfo;
+use embedded_graphics::{pixelcolor::Rgb565, prelude::Point};
+
+#[panic_handler]
+fn panic(info: &PanicInfo) -> ! {
+    print!("user panic: {} @ {:?}", info.message(), info.location(),);
+    loop {}
+}
+
+#[unsafe(no_mangle)]
+pub extern "Rust" fn _start() {
+    main()
+}
+
+pub fn main() {
+    print!("Starting Doom app");
+    let mut display = Display;
+}
diff --git a/user-apps/doom/stdio.h b/user-apps/doom/stdio.h
new file mode 100644
index 0000000..b86ad68
--- /dev/null
+++ b/user-apps/doom/stdio.h
@@ -0,0 +1,4 @@
+#ifndef STDIO_H
+#define STDIO_H
+
+#endif
diff --git a/user-apps/doom/string.h b/user-apps/doom/string.h
new file mode 100644
index 0000000..e8f8650
--- /dev/null
+++ b/user-apps/doom/string.h
@@ -0,0 +1,4 @@
+#ifndef STRING_H
+#define STRING_H
+
+#endif
diff --git a/user-apps/doom/strings.h b/user-apps/doom/strings.h
new file mode 100644
index 0000000..9ef223e
--- /dev/null
+++ b/user-apps/doom/strings.h
@@ -0,0 +1,4 @@
+#ifndef STRINGS_H
+#define STRINGS_H
+
+#endif