Disclaimer: the usage of cheat codes during a speedrun is prohibited (with an exception of the categories with "w/ cheats" label in the name)
Here is every single cheat code in Sly 1. They all start with the same, and then the ending varies. You will know the code has entered correctly because it will either be obvious, or you will hear a click sound.
- Unlock All Worlds and Levels
Down L2 R2 X Down L2 R2 X Left Circle Triangle - Unlock All Pages
Down L2 R2 X Down L2 R2 X Left Circle Down - Collect All Clue Bottles In Level
Down L2 R2 X Down L2 R2 X Left Circle Up - Infinite Lucky Charms
Down L2 R2 X Down L2 R2 X Left Circle Circle - Slippery Physics on Objects
Down L2 R2 X Down L2 R2 X Left Circle Right - Reload + Slippery Physics on Guards Down
L2 R2 X Down L2 R2 X Left Circle Left - Reload + No Cheats Down
L2 R2 X Down L2 R2 X Left Circle Start(disables Infinite Charms and Slippery Physics cheats) - Reload Level Down
L2 R2 X Down L2 R2 X Left Circle Select - Chetkido Password
Down L2 R2 X Down L2 R2 X Left Circle Square Square Square
The Chetkido Password code displays a secret popup message reading The password is: chetkido. However, the message will only appear under these four specific conditions:
- You are in Perilous Ascent
- You have 100% on your save file
- You have exactly 99 coins
- You have 0 lives left
Finally, there is a God Mode programmed into the game in which Sly cannot be damaged by anything, but it is not possible to enable it without hacks. To enable it, set Bit 0 at address 0x20262C64.
For full details on each cheat code and explanations of how they work, check out my Google Doc here: https://docs.google.com/document/d/1WMueShIbTVWnM86z6IrUR1xCSBIFaUjC__sPz7lNSs0/edit#heading=h.4835ndjnegbh