diff --git a/pkgs/development/tools/unity3d/default.nix b/pkgs/development/tools/unity3d/default.nix
deleted file mode 100644
index 5470c45b138a..000000000000
--- a/pkgs/development/tools/unity3d/default.nix
+++ /dev/null
@@ -1,143 +0,0 @@
-{ stdenv, lib, fetchurl, makeWrapper, file, getopt
-, gtk2, gtk3, gdk-pixbuf, glib, libGL, libGLU, nss, nspr, udev, tbb
-, alsa-lib, GConf, cups, libcap, fontconfig, freetype, pango
-, cairo, dbus, expat, zlib, libpng12, nodejs, gnutar, gcc, gcc_32bit
-, libX11, libXcursor, libXdamage, libXfixes, libXrender, libXi
-, libXcomposite, libXext, libXrandr, libXtst, libSM, libICE, libxcb, chromium
-, libpqxx, libselinux, pciutils, libpulseaudio
-}:
-
-let
-  libPath64 = lib.makeLibraryPath [
-    gcc.cc gtk2 gdk-pixbuf glib libGL libGLU nss nspr
-    alsa-lib GConf cups libcap fontconfig freetype pango
-    cairo dbus expat zlib libpng12 udev tbb
-    libX11 libXcursor libXdamage libXfixes libXrender libXi
-    libXcomposite libXext libXrandr libXtst libSM libICE libxcb
-    libpqxx gtk3
-
-    libselinux pciutils libpulseaudio
-  ];
-  libPath32 = lib.makeLibraryPath [ gcc_32bit.cc ];
-  binPath = lib.makeBinPath [ nodejs gnutar ];
-
-  ver = "2018.3.0";
-  build = "f2";
-
-in stdenv.mkDerivation {
-  pname = "unity-editor";
-  version = "${ver}x${build}";
-
-  src = fetchurl {
-    url = "https://beta.unity3d.com/download/6e9a27477296/LinuxEditorInstaller/Unity.tar.xz";
-    sha256 = "10gppnqacs1qzahj077nkcgbfz2lryd0dxnfcmvyc64xpxnj9nlk";
-  };
-
-  nosuidLib = ./unity-nosuid.c;
-
-  nativeBuildInputs = [ makeWrapper file getopt ];
-
-  outputs = [ "out" ];
-
-  sourceRoot = ".";
-
-  buildPhase = ''
-    cd Editor
-
-    $CC -fPIC -shared -o libunity-nosuid.so $nosuidLib -ldl
-    strip libunity-nosuid.so
-
-    cd ..
-  '';
-
-  installPhase = ''
-    unitydir="$out/opt/Unity/Editor"
-    mkdir -p $unitydir
-    mv Editor/* $unitydir
-    ln -sf /run/wrappers/bin/${chromium.sandboxExecutableName} $unitydir/chrome-sandbox
-
-    mkdir -p $out/bin
-    makeWrapper $unitydir/Unity $out/bin/unity-editor \
-      --prefix LD_LIBRARY_PATH : "${libPath64}" \
-      --prefix LD_PRELOAD : "$unitydir/libunity-nosuid.so" \
-      --prefix PATH : "${binPath}"
-  '';
-
-  preFixup = ''
-    patchFile() {
-      ftype="$(file -b "$1")"
-      if [[ "$ftype" =~ LSB\ .*dynamically\ linked ]]; then
-        if [[ "$ftype" =~ 32-bit ]]; then
-          rpath="${libPath32}"
-          intp="$(cat $NIX_CC/nix-support/dynamic-linker-m32)"
-        else
-          rpath="${libPath64}"
-          intp="$(cat $NIX_CC/nix-support/dynamic-linker)"
-        fi
-
-        # Save origin-relative parts of rpath.
-        originRpath="$(patchelf --print-rpath "$1" | sed "s/:/\n/g" | grep "^\$ORIGIN" | paste -sd ":" - || echo "")"
-        rpath="$originRpath:$rpath"
-
-        patchelf --set-rpath "$rpath" "$1"
-        patchelf --set-interpreter "$intp" "$1" 2> /dev/null || true
-      fi
-    }
-
-    upm_linux=$unitydir/Data/Resources/PackageManager/Server/UnityPackageManager
-
-
-    orig_size=$(stat --printf=%s $upm_linux)
-
-    # Exclude PlaybackEngines to build something that can be run on FHS-compliant Linuxes
-    find $unitydir -name PlaybackEngines -prune -o -type f -print | while read path; do
-      patchFile "$path"
-    done
-
-    new_size=$(stat --printf=%s $upm_linux)
-
-    ###### zeit-pkg fixing starts here.
-    # we're replacing plaintext js code that looks like
-    # PAYLOAD_POSITION = '1234                  ' | 0
-    # [...]
-    # PRELUDE_POSITION = '1234                  ' | 0
-    # ^-----20-chars-----^^------22-chars------^
-    # ^-- grep points here
-    #
-    # var_* are as described above
-    # shift_by seems to be safe so long as all patchelf adjustments occur
-    # before any locations pointed to by hardcoded offsets
-
-    var_skip=20
-    var_select=22
-    shift_by=$(expr $new_size - $orig_size)
-
-    function fix_offset {
-      # $1 = name of variable to adjust
-      location=$(grep -obUam1 "$1" $upm_linux | cut -d: -f1)
-      location=$(expr $location + $var_skip)
-      value=$(dd if=$upm_linux iflag=count_bytes,skip_bytes skip=$location \
-                 bs=1 count=$var_select status=none)
-      value=$(expr $shift_by + $value)
-      echo -n $value | dd of=$upm_linux bs=1 seek=$location conv=notrunc
-    }
-
-    fix_offset PAYLOAD_POSITION
-    fix_offset PRELUDE_POSITION
-  '';
-
-  dontStrip = true;
-  dontPatchELF = true;
-
-  meta = with lib; {
-    homepage = "https://unity3d.com/";
-    description = "Game development tool";
-    longDescription = ''
-      Popular development platform for creating 2D and 3D multiplatform games
-      and interactive experiences.
-    '';
-    license = licenses.unfree;
-    platforms = [ "x86_64-linux" ];
-    maintainers = with maintainers; [ tesq0 ];
-  };
-}
diff --git a/pkgs/development/tools/unity3d/unity-nosuid.c b/pkgs/development/tools/unity3d/unity-nosuid.c
deleted file mode 100644
index 26a923ab0394..000000000000
--- a/pkgs/development/tools/unity3d/unity-nosuid.c
+++ /dev/null
@@ -1,32 +0,0 @@
-#define _GNU_SOURCE
-
-#include <stdio.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <dlfcn.h>
-
-static const char sandbox_path[] = "/chrome-sandbox";
-
-int __xstat(int ver, const char* path, struct stat* stat_buf) {
-  static int (*original_xstat)(int, const char*, struct stat*) = NULL;
-  if (original_xstat == NULL) {
-    int (*fun)(int, const char*, struct stat*) = dlsym(RTLD_NEXT, "__xstat");
-    if (fun == NULL) {
-      return -1;
-    };
-    original_xstat = fun;
-  };
-
-  int res = (*original_xstat)(ver, path, stat_buf);
-  if (res == 0) {
-    char* pos = strstr(path, sandbox_path);
-    if (pos != NULL && *(pos + sizeof(sandbox_path) - 1) == '\0') {
-      printf("Lying about chrome-sandbox access rights...\n");
-      stat_buf->st_uid = 0;
-      stat_buf->st_gid = 0;
-      stat_buf->st_mode = 0104755;
-    };
-  }
-  return res;
-}
diff --git a/pkgs/top-level/aliases.nix b/pkgs/top-level/aliases.nix
index 34d68ed5f13d..c6825644784e 100644
--- a/pkgs/top-level/aliases.nix
+++ b/pkgs/top-level/aliases.nix
@@ -1412,6 +1412,7 @@ mapAliases ({
   ultrastardx-beta = throw "'ultrastardx-beta' has been renamed to/replaced by 'ultrastardx'"; # Converted to throw 2022-02-22
   unicorn-emu = unicorn; # Added 2020-10-29
   unifiStable = unifi6; # Added 2020-12-28
+  unity3d = throw "'unity3d' is unmaintained, has seen no updates in years and depends on deprecated GTK2"; # Added 2022-06-16
   untrunc = untrunc-anthwlock; # Added 2021-02-01
   urxvt_autocomplete_all_the_things = rxvt-unicode-plugins.autocomplete-all-the-things; # Added 2020-02-02
   urxvt_bidi = rxvt-unicode-plugins.bidi; # Added 2020-02-02
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 3f7b1251e0a5..114cc4d971b3 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -34879,12 +34879,6 @@ with pkgs;
 
   ums = callPackage ../servers/ums { };
 
-  unity3d = callPackage ../development/tools/unity3d {
-    stdenv = stdenv_32bit;
-    gcc_32bit = pkgsi686Linux.gcc;
-    inherit (gnome2) GConf;
-  };
-
   unityhub = callPackage ../development/tools/unityhub { };
 
   urbit = callPackage ../misc/urbit { };