What is a must be on action replay code?

Datel, the maker of Action Replay, has received several criticisms from the gaming world over its products. One of the most frequent complaints is the so-called "planned obsolescence", where codes for a just-released game require the most recent version of the cheat software. Datel as of nowcitation needed has encrypted the codes on the Action Replay for PS2, GC and GBA; this was meant to stop hackers from translating its codes for use in other cheating devices, but it prevents users from making their own codes for their games.

It also prevents the creation of codes using a template. There is, however, a program called 'GCNCrypt' that decrypts and encrypts Action Replay codes for the Nintendo GameCube, making editing and hacking of codes possible. Cheat codes normally involve a memory address, a value, and sometimes a trigger that says when the code is activated (always on, on at the start, on after a certain button press); because of this, for some games it is possible to create a code template, and derive hundreds of codes by modifying the values.

For example, in a role-playing game, one can use a code template and a table of values to create a code that will give any character, any piece of equipment in the game. By encrypting the codes, it is not possible to use such a template, and any code must be created and distributed by Datel; because of the sheer number of codes that can be created in this fashion, it is not plausible for Datel to release a list of codes with this versatility. A new Action Replay for the DS, which allows cheat codes (the previous Action Replay only managed game saves), uses unencrypted codes, and has a trainer toolkit available that allows users to create their own codes.

The PS2 Action Replay version occasionally corrupts the memory cards, leaving corrupt files on the card that cannot be deleted by the PS2. The Action Replay can, however, fix the memory card by formatting it, but the corrupted data cannot be restored. Cheating in online games is also usually frowned upon, with game companies making efforts to prevent and detect it.

However, with an Action Replay it is possible to cheat without being detected, or in a game for which there is normally no way to cheat. Examples include Phantasy Star Online for the Dreamcast, in which it was possible to manufacture items using an Action Replay in the offline mode, and then carry them over to the online mode undetectably. There was no way to determine if the item had been manufactured or legitimately won.

It is also possible for the Action Replay to disable anti-cheating code or otherwise prevent detection, however since most modern versions only allow codes to be created by Datelcitation needed and they have so far not taken this route, there are no such—for current generation systems. Other criticisms include the loss of data and or progress when using Action Replay. Entering an inappropriate or wrong code may not cause a noticeable loss in the area of play, however the data error takes effect after the Action Replay is removed from the user's system.

The ISA-based Action Replay needed memory-resident drivers for real and protected mode. The card had a grabber, a trainer and a slowdown feature. It could also interrupt the current game or save it to disk (freezer).