I am trying to use the cheat mode where you hit Backspace and a letter. I know, I'm lame. I've tried adding C7 Level1Diagnositic as an argument in an executible but this has not worked. I have found the dosbox.conf file for the game but am not sure where to type the command. Can anyone help me?

Here to help! (°°)7

Since this configuration of the game calls for a batch file named "menu.bat" you have to edit this one. It's located in the "\Corridor 7 Alien Invasion\C"-folder.

You have to edit that file wiht a text-editor of your choice. Scroll down to ":startgame" part and replace it with


:startgame
wbat cls (white on black)
cls
cd CORR7CD
echo on
CORR7CD level1diagnostic local keepfiles
cd ..
goto done


after this you can activate cheats witch CTRL+SHIFT+TAB while in game (there's a wrong combination circulating around the web)

Valid Codes are:

Backspace + G
Backspace + D
Backspace + W
Backspace + N
Backspace + R
Backspace + I
Backspace + P (followed by either SEQONE.CO7, SEQTHREE.CO7 or SEQFOUR.CO7 since this plays cutscenes)
Backspace + M
Backspace + C
Backspace + F
Backspace + T

Have fun!

Sorry for the late reply. I don't know why I didn't think to check until months later. But it worked! Thank you!

No worries! Glad I could help! :)