You need to provide details, such as the exact paths you are using. The 'missing executable' message is indicating you are installing to the wrong location, or it's not finding the correct executable. You are not using TexMod by any chance? -Dubious- I do not know what texmod is so im going to say no. so anyway, thank you for replying first off. i am going to go threw every step as i write it so i give an accurate account. so i log onto steam and make sure it is online and then started off with a clean install from steam, it has the sling shot dl, enemy within, and elite soldier pack. i verify integrity, from there i downloaded both the downgrade mod and long war mod. i put the downgrade into the steamapps/common folder and unzip it, and then run it. step one make sure steam is online step 2 and 3 no security alert came up so i hit no step 4 this is my hosts file # Copyright © 1993-2009 Microsoft Corp.## This is a sample HOSTS file used by Microsoft TCP/IP for Windows.## This file contains the mappings of IP addresses to host names. Each# entry should be kept on an individual line. The IP address should# be placed in the first column followed by the corresponding host name.# The IP address and the host name should be separated by at least one# space.## Additionally, comments (such as these) may be inserted on individual# lines or following the machine name denoted by a '#' symbol.## For example:## 102.54.94.97 rhino.acme.com # source server# 38.25.63.10 x.acme.com # x client host # localhost name resolution is handled within DNS itself.# 127.0.0.1 localhost# ::1 localhost# Prevent XCOM Phone Home#127.0.0.1 prod.xcom.firaxis.com#127.0.0.1 prod.xcom-ew.firaxis.com Step 5 verify. im going to post this and then start up again after it is done 100% complete so i hit ok step 6 start up game to menu and then exit out step seven i change my hosts to this # Copyright © 1993-2009 Microsoft Corp.## This is a sample HOSTS file used by Microsoft TCP/IP for Windows.## This file contains the mappings of IP addresses to host names. Each# entry should be kept on an individual line. The IP address should# be placed in the first column followed by the corresponding host name.# The IP address and the host name should be separated by at least one# space.## Additionally, comments (such as these) may be inserted on individual# lines or following the machine name denoted by a '#' symbol.## For example:## 102.54.94.97 rhino.acme.com # source server# 38.25.63.10 x.acme.com # x client host # localhost name resolution is handled within DNS itself.# 127.0.0.1 localhost# ::1 localhost# Prevent XCOM Phone Home127.0.0.1 prod.xcom.firaxis.com127.0.0.1 prod.xcom-ew.firaxis.com hit ok and then ok for step 8 and then wait till id does its thing step 9 i rename the file to xcom EU i go to start xcom and it says "failed to start game (missing executable)." and im really sad ive tried deleting and re-download and re-installing both steam and xcom. i tried just ignoring th error and trying to install long war, ive done it over and over so many time. i really hope im just missing something stupid and you call me a tard and we get it to work, that would be so freaking satisfying i even made an copy of everything before hand to compare the two, the only different thing i could find was the exicutible, the new one was just a tiny bit larger. idk man, i just dont know