Patches the Prototype game for modern machines (for macOS CrossOver Steam)

patch_prototype_game.sh

#!/bin/bash
set -o errexit -o pipefail
################################################################################
# Patches the Prototype game for modern machines.
# Based on info in the Steam forums and on [PCGW for Prototype](https://www.pcgamingwiki.com/wiki/Prototype)
################################################################################

# If no engine DLL in current directory go to the common path on macOS for the CrossOver Steam install
if ! [ -f "prototypeenginef.dll" ]; then
  cd "$HOME/Library/Application Support/CrossOver/Bottles/Steam/drive_c/Program Files (x86)/Steam/steamapps/common/Prototype"
fi

# Make a backup if there isn't already one
if ! [ -f "prototypeenginef.dll.bak" ]; then
  cp prototypeenginef.dll prototypeenginef.dll.bak
fi

# Force disable networking
dd bs=1 conv=notrunc  of=prototypeenginef.dll  seek=$(( 0x88168E ))  if=<(printf '\x90\xE9')

# Force max threads limit (8 works for my M2 Max CPU but some may need to set this to 4)
dd bs=1 conv=notrunc  of=prototypeenginef.dll  seek=$(( 0xB7F020 ))  if=<(printf '\x90\x90\xB8\x08')

# Force larger max memory for stack allocator
dd bs=1 conv=notrunc  of=prototypeenginef.dll  seek=$(( 0x641CC0 ))  if=<(printf '\x64')

# Force disable HID polling which can cause stutters
dd bs=1 conv=notrunc  of=prototypeenginef.dll  seek=$(( 0x623B10 ))  if=<(printf '\x11\x80\x7F\x24\x12\x74\x16\x80\x7F\x24\x13\x74\x10\xE9\xAE\x00\x00\x00')