Halloween Harry 1 (Crack)

@DrWatson

Published in

PC Games cracks

· 3 Aug 2019

This program will modify all of your save game files for Halloween Harry 1 (by Apogee) so that you will have 75 lives and 75 omegas, thermogrenades, photons, missles, and micronukes.
You will also be given $25,000 to buy more ammo.
If you don't like to start over a million times and just want to have some fun with this fairly decent new game, cheat!
I recommend that you save copies of all your game save files (they are named SLOT.? where "?" is a number from 1 to 5) before running this program in case you want to play as a mortal again!
Place the HARRYCHT.EXE file in the same directory as the save files and enter HARRYCHT to modify the files.

 
DETAILS: 
   This program works by changing the following bytes: 
   byte 20h (32 decimal)=omegas 
   byte 21h (33 decimal)=thermogrenades 
   byte 22h (34 decimal)=photons 
   byte 23h (35 decimal)=missles 
   byte 24h (36 decimal)=micronukes 
   bytes 25h and 26h (37 and 38 decimal)=$ 
   byte 27h (39 decimal)=lives

If you are handy with a hex editor, you can advance levels by increasing the value stored in byte 29h (41 decimal). Please note that the save file is stored as a simple substitution cipher where the stored value is equal to the actual hex value XOR 29.

What is XOR 29? XOR is an operation performed at the binary level. Each bit of the result is set to 1 if the corresponding bits of each operand are opposite.

    
   For example: 
      01h is 00000001 binary 
      29h is 00101001 binary 
      If you XOR 01h by 29h, you get 
             00101000 binary=28h 

   Thus, 01h is stored in the save file as 28h. 

 
Here are some examples to get you started: 
      HEX      XOR 29 
      00       29 
      01       28 
      02       2B 
      03       2A 
      04       2D 
      05       2C 
      06       2F 
      07       2E 
      08       21 
      09       20 
      0A       23 
      and so on.