History GameBreakingBug / RolePlayingGame

** ''VideoGame/PokemonScarletAndViolet'': At the game's launch, [=WiFi=] battles always started on the same RNG seed. While this is exploitable in itself, the worse issue was this particular RNG seed guaranteed that Sheer Cold, a OneHitKO move, would always hit the opposing Pokemon without fail, rendering battles pointless as it all comes down to who can use Sheer Cold first.

*** That's not too bad, since multiple patches have been developed to fix it for emulators, while the Virtual Console re-release fixed it (and even then, letting your game sit idle for 20 minutes will restore it back to normal until another freeze happens). A worse bug happens when you try to use the Free Space battle board to fight the bosses of the opposite version of the game, because it's entirely possible to do this as early as the first tournament, but doing it before you obtain all 6 Double Souls of your game version (meaning a NewGamePlus ''Plus'' at least) will permanently corrupt the game's code (as it screws up the order of the Double Souls), which means your cartridge will be literally broken, as in it will crash and the title screen won't even start up, leaving your game as nothing more than a useless piece of plastic.

* ''VideoGame/Persona3'', at least the ''Portable'' version due to the player reports coming from there, has the FinalBoss potentially becoming {{Unwinnable}} at the final phase because a glitch can cause it to refuse to drop its AttackReflector even after more than the normal number of turns has passed.

* At least in the multiplatform port of ''VideoGame/Persona5 Royal'', there is a chance of softlock while performing a gun customization, preventing the player from quitting out of the Untouchable menu.

* The North American release of ''VideoGame/ArTonelicoIIMelodyOfMetafalica'' has a big one during the last fight against [[spoiler:Raki]] in the final area of the game. On her sixth action, if you haven't dealt about 80% or more damage to her, she is supposed to use an attack called "Fractal Change", which does a random Jamming effect out of the four and shifts her stats between four random possible patterns. However, due to the removal of the attack's code and typing between translation and making the final copies, the game simply freezes up. It would be okay if it was any other boss, but this is the optional boss, which must be defeated ''fifteen'' times for HundredPercentCompletion. There have been workarounds (from taking advantage of another bug to just outright patching and hacking), but this is on ''every single copy'' released in the NTSC region. Oh, and NISA's response? Either level enough so that you can beat enough shit out of her to prevent the turn 6 freeze, or just beat all the shit out of her outright before the attack even comes. Replakia works wonders, but it's not a miracle worker, NISA. Supposedly, the European version fixes this bug.

** The SNES release of ''VideoGame/FinalFantasyIV'' has a glitch that can take the player to "dummy" rooms filled with garbage tiles or even erase a save file if the player goes up and down a staircase in a given area 64 times due to an oversight involving what's considered an entrance or an exit. In a promotional newsletter called "The Ogopogo Examiner" that Square released around the time of the original US release, it was dubbed "The Eight-Square Curse of Destruction".

* The NTSC version of ''VideoGame/PandorasTower'' has a particularly nasty one where the game wherein the game will freeze every time you visit the eleventh and twelfth dungeons in the game (really a single dungeon that has a DarkWorld mechanic) every visit after the first. While it can be worked around, the process is complicated and infuriating. While what triggers it is not definitively known, it is frequent, and since most dungeons in the game require you to leave them while you play through them, it's one many, many North American players have encountered. Common speculation is that it's related to the cutscenes that play when you enter a dungeon for the first time, since the eleventh and twelfth towers are the only dungeons you can enter in any way but from the entrance since you can warp between them. Most gallingly, the glitch seems to be related to a disc pressing error, since the European versions (which used the exact same code) and the digital versions do not have the glitch.

* The UsefulNotes/NintendoSwitch port of ''VideoGame/KnightsOfTheOldRepublicIITheSithLords'' was unbeatable in its original release, containing a bug that makes it impossible to progress past a certain cutscene midway through the game. Port developer Aspyr has acknowledged the bug and promised a fix.

** ''VideoGame/PokemonScarletAndViolet'': At the game's launch, WiFi battles always started on the same RNG seed. While this is exploitable in itself, the worse issue was this particular RNG seed guaranteed that Sheer Cold, a OneHitKO move, would always hit the opposing Pokemon without fail, rendering battles pointless as it all comes down to who can use Sheer Cold first.

* The English release of ''VideoGame/ArTonelicoIIMelodyOfMetafalica'' has a big one during the last fight against [[spoiler:Raki]] in the final area of the game. On her sixth action, if you haven't dealt about 80% or more damage to her, she is supposed to use an attack called "Fractal Change", which does a random Jamming effect out of the four and shifts her stats between four random possible patterns. However, due to the removal of the attack's code and typing between translation and making the final copies, the game simply freezes up. It would be okay if it was any other boss, but this is the optional boss, which must be defeated ''fifteen'' times for HundredPercentCompletion. There have been workarounds (from taking advantage of another bug to just outright patching and hacking), but this is on ''every single copy'' released in the NTSC region. Oh, and NISA's response? Either level enough so that you can beat enough shit out of her to prevent the turn 6 freeze, or just beat all the shit out of her outright before the attack even comes. Replakia works wonders, but it's not a miracle worker, NISA. Supposedly, the EU version fixes this bug.

** The PAL version (or at least, some versions of the PAL version) of ''Atelier Iris ~Eternal Mana~'' has an irritating bug ''right'' at the very end of the game where it will crash during the ending sequence. This is doubly annoying, as not only is it impossible to see the entire ending, but you also can't get a completed save file as a result, preventing you from playing the NewGamePlus.

* There are quite a few bugs in ''VideoGame/LufiaIIRiseOfTheSinistrals'', both in Japan and in the U.S. The most complicated one is the Submarine Shrine, where a graphics screw-up makes the inside of the shrine almost completely black; however, you can still go up until you stop at [[spoiler:Dual Blade]], but you just won't see it OR [[spoiler:the BigBad himself, Daos]]. Thankfully, this glitch is fixed along with all the other glitches in the Europe/Australia PAL region version.

** The PAL version of ''VideoGame/SuperPaperMario'' has a glitch that freezes the game if you do some stuff out of order. Not SequenceBreaking, just completing some tasks without talking to someone nearby who specifically tells you to do them. Since the Wii doesn't do downloadable content and patching very well, Nintendo just let people swap for a patched disc if they really wanted to.

** The PAL release of ''VideoGame/WildArms4'' has a bug that makes it impossible to proceed at one point in the game if you're playing in PAL display mode. However, it can be easily worked around by switching to NTSC mode until you're past the aforementioned buggy point.

*** Version 1.6 created a massive bug in the settlements, causing many of them to set their food, water, defense, and power resources to zero, with all the associated problems having none of these resources would cause. Some players report scrapping televisions and jukeboxes helps to fix the problem, but for others, that still doesn't work. Considering settlement building was one of the massive selling points of Fallout 4 in the first place, it made a lot of people really angry, and, as of 1.7, it still has not been fixed.
*** Entire quests can't be done because of the sheer amount of bugs in the entire game and the DLC. Quests can never be started, ones that can can glitch and never have their objectives completed, NPC quest givers can never appear or be talked to, the game can just crash at the wrong time. As said on [[YMMV/{{Fallout4}} the YMMV page]] for ''Fallout 4'', Jeff Gerstmann of Website/GiantBomb and French review site Gamekult have both given the game "low" scores (3/5 [on consoles] for the former and 6/10 for the latter, both middle of the road scores) because of the sheer amount of bugs and performance issues that ultimately ruin the enjoyment of players.

*** ''New Vegas'' still enjoys glitching out when it comes to loading; it's not uncommon on even patched vanilla installs to have the game inexplicably and quietly crash behind a loading screen, ''any'' loading screen, therefore leaving you looking at a spinning roulette wheel forever. Or until you quit and reset. Usually the solution is to employ a save file backup on the PC (helpfully auto-created by ''New Vegas''), or pray one of your older saves will work and not trigger the issue again.

*** While now patched, on launch there was a bug where if you killed Caleb Mccaffery on the strip (as part of a quest you get in Freeside), trying to load a game that was saved on the strip causes the game to crash. Seeing as three of the four faction quests are found on the strip, and the game is notorious for crashing anyway, combined with the sheer amount of autosaving the game does on the strip, it was very easy to lose your save file.

*** The Xbox 360 version has a very severe issue in that, occasionally, after having beaten the game and started playing again, the level up feature won't activate. Many players won't realise until they actually check the XP meter and see something ridiculous like '5400/200'. What makes this worse is that the only known way to fix this is to delete all save data of both your new save, and the previous one on which you completed the game, and this isn't actually a sure fix. It's more wishful thinking. You better pray it works, otherwise the hours you spent wandering the waste and finishing every quest were deleted for nothing.

* ''VideoGame/{{Earthbound}}'':

* ''VideoGame/ShinMegamiTenseiNINE'':
** Drive Shot is a Gun skill that deals damage to a row of enemies. Most Xbox emulators do not play nice with this skill, and may crash whenever it's used.
** One of the VideoPhone calls in Chapter 2 has a tendency to crash emulators as well.

*** ''Oblivion'' also has its fair share of bugs, but one notorious one in the [=PS3=] Game of the Year version renders the state of Vampirism to be incurable because a certain EventFlag during the [[ThatOneSidequest Vampirism]] [[FetchQuest Cure quest]] fails to work properly. Strangely enough, this bug appeared in the original versions for the PC and 360 and was quickly patched up, while the [=PS3=] original version released a year later does not have the bug. This makes people wonder [[WhatWereYouThinking what the developers were thinking]] when it was [[WhatAnIdiot somehow re-introduced in the Game of the Year edition]]. Strangely, the glitch is only present on the English version. Switching languages temporarily allows the player to finish the quest, but doing so completely resets the Shivering Isles expansion.

* ''VideoGame/{{Nostalgia}}'' has a particularly painful one of these, known by fans of the game as simply the "Albion glitch", after the SequentialBoss it affects. Roughly two-thirds of the way through the game - fifteen to twenty hours in, depending on how many sidequests you take on - you fight Albion, a dragon, in your airship... after which he demands you face him [[HonorBeforeReason without the "help" of the airship]]. Upon landing, he's supposed to appear and you're almost immediately taken into the boss battle... except that in a large number (somewhere between a third to half) of US-released carts, ''this second battle simply doesn't trigger'', leaving the game completely {{Unwinnable}}. And unlike most bugs of this type, this isn't fixed by starting a new game. If the Albion glitch occurs, the only solution is to ''get a new copy of the game''.

*** Many of these glitch Pokémon know the series of volatile glitch moves popularly known as [[https://bulbapedia.bulbagarden.net/wiki/Super_Glitch_(move) Super Glitch]], which can screw with the game if you so much as ''look'' at it, much less use it in battle. Even trying to forget the move to make the glitch Pokémon safe can make it activate as well.

* ''VideoGame/MegaManBattleNetwork 3'' touted that players with different versions could link their games together and essentially merge the other version's Net Navi fights and scenarios into their own game as well as get an extra bonus tournament with extra challenge modifiers depending on the other player's HP and Chips. The problem? Doing this for the extra content as soon as possible will ''brick your cartridge''. If your save has not fought all six of the Navis in your cartridge version before a link up occurs, which basically means having played the game on NewGamePlus multiple times to encounter them all given you can't accomplish that in a single run, it breaks the scripting for your own version's tournament scripts, and that specific cart is forever stuck trying to load content it simply can't figure out, rendering your game a useless piece of plastic.