I discovered on my own the hidden merchant chest in Skyrim, the Dawnstar one as I was looking around for either flowers or ore. I also figured out the merchants restock if you save, hit them and then reload save. Both I imagine lots of people found out but these are the only two off of the top of my head

Screenwraps in Zelda 1 and TMNT,
Wrong warp in Zelda 2,
Out of bounds gliches and many, many more things in A Link to the Past.

empyreon galactic survival : food bars that you keep in your suit production slot wont decay forever : dunno if they fixed it yet

In Sonic R, there’s a track with an explicit “trap hole”, and a long winding path to climb back up. If you just don’t climb back up and explore the map, you’ll find yourself back at the track’s beginning, and it’ll count as a full lap. Cuts the laptime in half.

Deathloop if you stack melee Regen based skills you can essentially be unkillable.

Biggest exploint? Nah…

Most cool one? Definetly.

Game: Commander Keen 4: Secret of the Oracle From 1991.

I discovered a secret area in the first level that gave you 8 extra lifes. Just take them. Die and rinse and repeat.

Note: I was at most 6-7 years old when discovered this myself and i rebought commander keen a few years ago, the secret area is still there!

edit: here’s a video of the area https://www.youtube.com/watch?v=Z29jQvVLaXY. Still blows my mind i discovered this on accident as a kid.

Super Mario Bros. World 1-2 break into the ceiling and you can run and skip most of the level

never had one.

I played SWG full time on the test server. They were testing a new raid type system and were ready to release it after a 3 day weekend. I was playing one of the new raids with my guild on that Friday before release. I was in the middle of a fight against a boss named Lelli and was frantically trying to write a combat loop macro in mid fight. Instead of entering “/target Lelli” I entered “/Lelli”.

When the macro was run, it made me invisible, untargetable, immune to damage, and with all of Lelli’s abilities, including being flagged to attack other players at will whether they were flagged for pvp or not. Basically I could one shot kill anyone I wanted with complete impunity.

Nothing the in game GMs could do would reverse it. QA was unable to write a batch script to unflag me or a group of players at once. My account had to be manually edited.

If it had gone live the following Tuesday, they told me it would have literally ended the game. QA would have had to manually edit every single account that used the exploit.

I got an email from John Smedley and he logged into the game to personally thank me for finding the exploit before it went live.

GTA online car dupe glitch. I used it nonstop before it was eventually patched. I own everything I could want in the game and still have a ton of garages full of cars to sell.

Also, the gold bar glitch in RDR2 that allowed you to just keep picking up the same gold bar indefinitely. I tapped down the button on my controller and just let it run all day.

In Return to Castle Wolfenstein, if you save a very large non-patternic integer (1759437) and then load it, it would take a very long time to load, which in turn makes enemy encounters funny because AI will die. You will see the enemy’s hidden loadout, enemies will fall asleep on the ground, will look around but don’t shoot, etc.

You can kill them and then save. However, events won’t happen. For example, if a boos should appear, if won’t until you quicksave, exit to main menu, and then load the quicksave.

When I was little, I found out how to duplicate items in mobile terraria by making and deleting cloud versions of characters and putting their items in a chest and rinsing and repeating.

One of the older madden games (like somewhere between 06-09) I found a way to get guaranteed onside kicks. If I scored i would always get the ball back. Worked online too. Lots of rage quitters after the 2nd or 3rd time

I was a professional game tester for 13 years, so I found some big ones in my time. But my favorite was DOOM 3 for Xbox. Triggering a cutscene caused the game to memory dump everything else, which despawned every enemy active on the map at the time. So if you memorized where the cutscene triggers were, you could sprint around the whole map, spawn in every monster, and then trigger the cutscene to kill everything without firing a single shot.

How has no one mentioned Halo 2

Going through the campaign, end a level with an empty energy sword and you start the next sequential mission with an infinite Energy sword.