History GameBreakingBug / FirstPersonShooter

* An update patch for the UsefulNotes/Xbox360 version of ''VideoGame/FarCry3BloodDragon'' causes the game to crash with a "Disc Unreadable" error during the intro, at least on certain console models.

** In all versions of ''TNT: Evilution'' (one half of ''VideoGame/FinalDoom'') except for the [[http://doomwiki.org/wiki/Id_Anthology id Anthology]] and Website/GOGDotCom versions, the first secret level, "Pharaoh", is impossible to finish in single-player without cheating or engaging in SequenceBreaking because the level's designer mistakenly flagged a vital key as multiplayer-only. The creators, [=TeamTNT=], soon released a patch to correct the bug and make it winnable, and a version with the level fixed was also included in the id Anthology. It would not be until the GOG.com release in 2015, however, that the fixed version would be sold by id Software in a widely-released form, almost ''20 years'' after ''Final Doom'' originally came out. As for the SequenceBreaking part, an oversight by the map author ([[https://doomwiki.org/wiki/Linedefs_can_be_activated_regardless_of_player%27s_Z_position and a couple of bugs in the Doom engine]]) means that by [[http://doomwiki.org/wiki/Straferunning straferunning]] onto the right-hand throne, you can activate the switch hidden on the "backrest" to open the door to the last few areas and skip almost the entire map.

** The Cloaker is already a nasty piece of work that can down you instantly with a kick, but in the pre-release beta he was even worse, as he would ''literally kick you back to the desktop''. He was subsequently removed from the beta and had to sit out of the release version until being re-added in Update #23 nearly half a year later.

* ''VideoGame/MedalOfHonor 2010'' has a lot of these bugs, such as {{scripted event}}s failing to activate, and parts of levels failing to draw in, causing you to fall to your death in the void. ''Warfighter'' continued these bugs. On the monsoon level, it's entirely possible to move faster than the game expects and trigger a checkpoint, just as you encounter a scripted set-piece. This results in the game crashing, which is irritating but manageable. The game-breaking part sets in when you reload and find that all you can do is walk - not run - around with your gun lowered like a duck in a shooting gallery waiting for a setpiece to go off that won't trigger, while the mooks shoot at you and your AI allies are busy missing them. The only solution is restarting the entire level.

* In ''VideoGame/Battlefield2142'', you can move the Titans around, allowing you to use their weapons in an effort to win the round. Unfortunately, doing so lagged many servers as they moved about, not to mention during firefights on a moving Titan, bodies will glitch through the floor, preventing them from being revived. Dice eventually patched the game so that servers can disable Titan movement, unfortunately removing a otherwise useful tactic of the game mode, as most servers went with the disable movement option.

** The mission "Suffer With Me" in ''VideoGame/CallOfDutyBlackOpsII'' has a weird glitch where Mason (who is an NPC in this mission) will get stuck at the top of some stairs and start "dancing" (it's the only possible explanation for whatever the hell he's doing). While humorous to watch, it completely halts your progress since [[InsurmountableWaistHeightFence there's a door that needs opening]]. You can occasionally dislodge him from the spot, only for him to go back to it and continue dancing. The only choice is to restart the mission from the beginning. The same glitchy dance-thing can happen to Hudson during the uphill battle in the last game's "SOG" mission, but it's more hilarious than game-breaking as nothing (beyond the usual enemies with guns) is preventing you from moving onward. Once you hit the cutscene trigger at the top of the hill, Hudson, apparently realizing he's being an idiot, will knock it off and move forward as he's supposed to.
** ''[[VideoGame/CallOfDutyWorldAtWar World at War]]'' has semi-scripted sequences during banzai charges where being attacked by a charging Japanese soldier will cause the game to switch to the HUD-less "cinematic" view as he knocks you down, with a QTE to stab him in the neck and get back to the game. Should a lucky shot from an NPC kill the soldier at the exact moment where the banzai stab animation begins but before the player and soldier become invincible, the player will be stuck on the ground permanently (since there's no soldier to stab to return to the game) and the level needs to be restarted. The same sort of bug appears in one specific part of ''Black Ops'' - if you're hit by the first attack dog you see in the second part of "WMD", even if you hit the QTE to break its neck, your weapons will suddenly disappear and you won't be able to grab new ones from enemies, making you completely incapable of fighting. Your NPC allies can still shoot enemies, but [[https://www.youtube.com/watch?v=YGWGRc-XuWk they're not exactly very good at it]].

* ''VideoGame/{{Daikatana}}'' has a host of these:

* An update patch for the UsefulNotes/XBox360 version of ''VideoGame/FarCry3BloodDragon'' causes the game to crash with a "Disc Unreadable" error during the intro, at least on certain console models.

** The final boss will randomly become untargetable (and thus invulnerable). This is made especially pernicious as the battle in question involves three separate phases and the bug can manifest itself during any one of these. Saving the game mid-fight does not help, and the community never quite figured out what caused the dreaded bug. The only solution is to save before the fight and keep reloading until it goes right. This can take as many as five or six attempts.

* The first ''VideoGame/SystemShock'' has received one as time goes on. First, it's designed for old MS-DOS systems and won't run on modern Windows. Fine, there are plenty of good DOS emulators out there that can do the job. Here's the problem: the final battle is a TimedMission of sorts, as you have to destroy SHODAN before she finishes [[MindRape Mind Raping]] you. The countdown is not based on the clock, but instead on your processor cycles... which on a modern machine, run many hundreds of times faster than they did back when the game was released. This can easily render the final battle unwinnable, as there is no way to damage SHODAN enough before you die. You'll have to limit the processor speed on the emulator if you want to have a chance at this. [[UpdatedRerelease The Enhanced Edition]] intermittently fixes this bug (if it doesn't, enabling Vsync in options generally does the trick).

* The Activision PC game ''Revolution'' had a level that actually could not be beaten without a cheat code. A patch supposedly fixed it, but it would not work on existing saves (requiring that the game be completely started over). [[http://www.gamespot.com/reviews/revolution-review/1900-2898384/ Here's a very amusing review at GameSpot.]]

* ''VideoGame/{{Deathloop}}'' relies on the player finding and killing eight "Visionaries" all on the same day day in a RogueLike structure. In order to pack enough punch to pull it off, you'll need to kill each of the Visionaries and retrieve the powerful gear they drop. Which ''loves'' to fall into level geometry, just out of reach. The only option when this happens is to restart the whole level.

* In the original ''VideoGame/DeusEx'', it's possible for the player to bring the game to a grinding halt by succeeding when the game needs them to fail. At one point, the plot requires the player character to be arrested and detained at UNATCO headquarters. The main character emerges from a subway station and is confronted by a squad of UNATCO troopers, a cybernetically-augmented agent and a few heavy-duty bipedal combat robots. Normally, the player character can choose either to go quietly or get the tar whipped out of him and wake up in a UNATCO prison cell. However, skilled (or incredibly patient) players can pick off the troops who are meant to take the player down in a hail of bullets, leaving nobody alive but them. Unfortunately this also leaves them with no way to advance to the next chapter, and the player becomes stuck in the decrepit shanty town that surrounds the subway station. A subsequent patch fixed this by marking the augmented agent as invulnerable, meaning no matter how many grunts got mowed down there'll always be one unkillable badass ready to put bullets into the player.