Remember GameShark or ‘IDDQD’ in Doom? Cheat codes used to be Easter eggs - devs baked them in as playful secrets. Now? They’re mostly third-party tools. I’ll use them to relive childhood games (like maxing Simoleons in The Sims), but never in online leaderboard runs. Finding them requires digging through old GameFAQs threads or PCGamingWiki.