Teaching Boole-algebra is not part of this tutorial. You can use calc.exe to calculate XOR.įor more information, use Google. When two bits on top of each other are equal, the resulting bit is 0. To understand XOR better, consider those two binary values: The XOR instruction connects two values using logical exclusive OR (remember OR uses It is very easy to understand the process if You know what is this instruction. In fact, most encryptions in the games are using a simple XOR instruction to mess up the value and confuse beginners. XOR is used in encryptions very frequently. Ok You should have found the codes that I have mentioned and if You look at it, You will find the XOR instruction in every cases. NOTE: You can search for food or points too if it is easier for You. You will find some high values which are not making any sense at all. What You need to do is set the value type to Byte and search for changed/unchanged values when You die. The reason of this failure: the game is using encrypted values to store the lives, points, food, missiles and keys. If You have tried to search for it, You have probably failed miserably. In this whole tutorial, we will try to change the amount of lives. Now change the game to run in window mode (not in fullscreen). Ridiculously stupid concept but the game itself (regarding the programming, graphics and music) is not a bad job. A simple space shooter against evil chickens. If You have installed the game, play with it a bit to get familiar what kind of game is this. This is the program and the exact version that I will use for the demonstration. The game that I will use is Chicken Invaders 4, but this tutorial contains generic information that can be used in other programs too.Īlright, the first step is to aquire the target process, Chicken Invaders 4 v4.00. I will use Cheat Engine 6.0 so get the latest version from here: This tutorial will cover info about basic encryptions, checking values in the stack and backtracing some functions in the program. Usually I don’t write any tutorial where the target process is not freely available, but recently I found a game which is small enough, somewhat popular amongst kids and most importantly, it is a fine example to show basic encryptions. If some of you found Geri’s Original article, please let me know. Below here is a from Geri + my own picture But without Geri, I will still be zero until now. If you have play this game before, you may know that I have unlock all the key, using Cheat Engine and the knowledge I learn. Geri tutorial is very good, I just hate it if it gone like that. All I can find is the copy of his post without pictures, some also The original is lost in the net, or is just me, I can’t find his original post Original article is by – Geri, I only put in the pictures & reedit a bit. I am the newbie in cheat engine, but I learn from the best. Breathing a sigh of relief, I sat down to enjoy a double chicken-burger with crispy chicken wings on the side.Find out what write to this address, Show disassembler, Break and trace instructions, Debug – Toggle Break Point, memory view – tools -auto assemble – template – AOB injection Basic encryptions, debugging, backtracing and some info on the stack After their last retreat, I headed for my local Space Burger to bask in the glow of my recent victory. Three times I managed to push them back whence they came, and secure humanity a few more years as the dominant species of this planet. Three times they invaded, each time with increasingly devious plans. Squawks, feathers flying, the smell of charred chicken everywhere. With a greasy finger I set my lasers to "extra crispy" and blasted off to intercept the fowl invaders. I dropped my half-eaten chicken burger and jumped in my cockpit. Invading intergalactic chickens, out to punish humanityfor our oppression of their earthly brethren. They came without warning, squawking menacingly, their ruffled feathers darkening the sun. The memories still burn deeply, like spicy chicken wings. Battle hordes of space chickens in Chicken Invaders 4.
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