diff --git a/scummvm-sa/instruction_ScummVM_build.md b/scummvm-sa/instruction_ScummVM_build.md
new file mode 100644
index 0000000..4427bad
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+++ b/scummvm-sa/instruction_ScummVM_build.md
@@ -0,0 +1,117 @@
+Link : https://portmaster.games/build-environments.html#2-wsl2-chroot
+
+2. WSL2 chroot 
+For more information, visit the GitHub Repository .
+
+Build Environment 
+
+Instructions to set it up: 
+
+Install required packages on Ubuntu 20.04 LTS WSL 2:
+sudo apt install build-essential binfmt-support daemonize libarchive-tools qemu-system qemu-user qemu-user-static gcc-aarch64-linux-gnu g++-aarch64-linux-gnu
+
+(Download 20.04 Focal server-cloudimg-arm64-wsl.rootfs.tar.gz from Ubuntu Cloud image. Ubuntu Cloud Image)
+wget https://cloud-images.ubuntu.com/releases/focal/release/ubuntu-20.04-server-cloudimg-arm64-root.tar.xz
+
+Extract the tarball in a folder:
+
+mkdir folder
+(sudo bsdtar -xpf ubuntu-20.04-server-cloudimg-arm64-wsl.rootfs.tar.gz -C folder)
+sudo bsdtar -xpf ubuntu-20.04-server-cloudimg-arm64-root.tar.xz -C folder
+
+Copy qemu static binary into that folder:
+sudo cp /usr/bin/qemu-aarch64-static folder/usr/bin
+
+Start systemd with daemonize:
+sudo daemonize /usr/bin/unshare -fp --mount-proc /lib/systemd/systemd --system-unit=basic.target
+
+Check if AARCH64 binfmt entry is present:
+ls /proc/sys/fs/binfmt_misc/
+
+Mount and chroot into the environment:
+sudo mount -o bind /proc folder/proc
+sudo mount -o bind /dev folder/dev
+sudo chroot folder qemu-aarch64-static /bin/bash
+
+In the chroot, delete /etc/resolv.conf file and write a name server to it.
+rm /etc/resolv.conf
+echo "nameserver 8.8.8.8" > /etc/resolv.conf
+Exit chroot mkdir -p folder/tmp/.X11-unix
+
+Create chroot.sh:
+
+#!/bin/bash
+
+sudo daemonize /usr/bin/unshare -fp --mount-proc /lib/systemd/systemd --system-unit=basic.target
+
+sudo mount -o bind /proc folder/proc
+sudo mount -o bind /dev folder/dev
+sudo mount -o bind /tmp/.X11-unix folder/tmp/.X11-unix
+xhost + local:
+sudo chroot folder qemu-aarch64-static /bin/bash
+
+Make the chroot.sh executable:
+chmod +x chroot.sh
+
+Chroot into the new environment:
+sudo ./chroot.sh
+
+Update & Upgrade the chroot:
+apt-get update && apt-get upgrade 
+
+Helpful development tools & libraries to have in the chroot:
+apt-get install --no-install-recommends build-essential git wget libdrm-dev python3 python3-pip python3-setuptools python3-wheel ninja-build libopenal-dev premake4 autoconf libevdev-dev ffmpeg libboost-tools-dev magics++ libboost-thread-dev libboost-all-dev pkg-config zlib1g-dev libsdl-mixer1.2-dev libsdl1.2-dev libsdl-gfx1.2-dev libsdl2-mixer-dev clang cmake cmake-data libarchive13 libcurl4 libfreetype6-dev librhash0 libuv1 mercurial mercurial-common libgbm-dev libsdl-image1.2-dev
+
+Install custom SDL2 Libraries for better compatibility:
+rm /usr/lib/aarch64-linux-gnu/libSDL2.* 
+rm -rf /usr/lib/aarch64-linux-gnu/libSDL2-2.0.so*
+
+wget https://github.com/libsdl-org/SDL/archive/refs/tags/release-2.26.2.tar.gz
+./configure --prefix=/usr
+make -j$(nproc)
+make install
+
+/sbin/ldconfig
+
+For ScummVM build, additional packages needed
+
+apt-get install -y liba52-0.7.4-dev libjpeg62-turbo-dev libfaad-dev libsdl2-net-dev libspeechd-dev libfribidi-dev libglew-dev
+apt-get install -y libjpeg-turbo8-dev
+apt-get install -y libtheora-dev libcurl4-openssl-dev libmpeg2-4-dev libgif-dev
+
+git clone --recursive https://github.com/FluidSynth/fluidsynth.git
+cd fluidsynth
+git checkout v2.3.4
+mkdir -p build
+cd build
+cmake -DCMAKE_INSTALL_PREFIX=/usr -DLIB_SUFFIX="" ..
+make -j$(nproc)
+make install
+cd ..
+
+git clone -b branch-2026-1-0 --recurse-submodules -j"$(nproc)" https://github.com/scummvm/scummvm.git
+cd scummvm
+patch -p1 < ../scummvm-000-cacert-env.patch
+./configure --backend=sdl --enable-optimizations --opengl-mode=gles2 --enable-vkeybd --disable-debug --enable-release --enable-fluidsynth --enable-all-engines
+make -j$(nproc)
+strip scummvm
+apt update && apt install p7zip-full -y
+7z a -t7z -m0=lzma2 -mx=9 -md=128m -mfb=273 -ms=on scummvm.7z scummvm
+
+mkdir OUT_DIR
+mkdir -p ./OUT_DIR/LICENSES ./OUT_DIR/Theme ./OUT_DIR/Extra
+mkdir -p ./OUT_DIR/Extra/shaders
+cp -f LICENSES/* ./OUT_DIR/LICENSES/
+cp -f dists/soundfonts/COPYRIGHT.Roland_SC-55 ./OUT_DIR/LICENSES/
+cp -f gui/themes/*.dat gui/themes/*.zip ./OUT_DIR/Theme/
+cp -f dists/networking/wwwroot.zip ./OUT_DIR/Theme/
+cp -f -r dists/engine-data/* ./OUT_DIR/Extra/
+rm -rf ./OUT_DIR/Extra/patches
+rm -rf ./OUT_DIR/Extra/testbed-audiocd-files
+rm -f ./OUT_DIR/Extra/README
+rm -f ./OUT_DIR/Extra/*.mk
+rm -f ./OUT_DIR/Extra/*.sh
+cp -f backends/vkeybd/packs/vkeybd_default.zip ./OUT_DIR/Extra/
+cp -f backends/vkeybd/packs/vkeybd_small.zip ./OUT_DIR/Extra/
+cp -f dists/soundfonts/Roland_SC-55.sf2 ./OUT_DIR/Extra/
+find engines/ -type f \( -name "*.fragment" -o -name "*.vertex" \) -exec cp -f {} "./OUT_DIR/Extra/shaders/" \;
\ No newline at end of file
diff --git a/scummvm-sa/scummvm-000-cacert-env.patch b/scummvm-sa/scummvm-000-cacert-env.patch
new file mode 100644
index 0000000..421541f
--- /dev/null
+++ b/scummvm-sa/scummvm-000-cacert-env.patch
@@ -0,0 +1,26 @@
+diff --git a/backends/networking/basic/curl/cacert.cpp b/backends/networking/basic/curl/cacert.cpp
+index 24ced7fa..8c09fe0e 100644
+--- a/backends/networking/basic/curl/cacert.cpp
++++ b/backends/networking/basic/curl/cacert.cpp
+@@ -20,12 +20,21 @@
+  */
+ 
+ #include "backends/networking/basic/curl/cacert.h"
++#include <stdlib.h>
++
++#ifdef getenv
++#undef getenv
++#endif
+ 
+ #include "common/fs.h"
+ 
+ namespace Networking {
+ 
+ Common::String getCaCertPath() {
++	const char *envPath = getenv("CURL_CA_BUNDLE");
++	if (envPath && *envPath) {
++		return Common::String(envPath);
++	}
+ #if defined(DATA_PATH)
+ 	static enum {
+ 		kNotInitialized,