History GoodBadBugs / Borderlands2

* The ragdoll physics don't quite work right sometimes, especially with Loaders, as shown [[https://www.youtube.com/watch?v=zqt5jLVDnxY here]]. Unlike the Evil Smasher bug, the devs simply left that one in [[RuleOfFunny just because it's hilarious]].

* In the only true EscortMission in the game, where you escort the constructor bot in Opportunity to destroy Jack's statues, if you stay as far away as possible from the allied constructor NPC, no enemies will spawn near it. However, you should clear the area where the statues are of enemies prior to starting the quest, as they will attack the constructor and given enough time, can kill it.
* There's a spot nearby where Saturn spawns that if you stand there, it can't attack you. It just sits there and doesn't move no matter how much lead you pump into it. There are also spots for the end boss and the first raid boss where he absolutely can't hit you (though Terramorphous' tentacles can still hurt).
* If you get Gaige's Anarchy up high enough (>550, only possible with the Slayer of Terramorphous) and use a weapon that's low-accuracy to begin with (less than 30), her accuracy will apparently make a RealityBreakingParadox, break the game, and enter the territory of EpicFail. The targeting reticule (which should, at this point, be the entire screen) will shrink to a pinpoint, but instead of being incredibly precise the bullets will follow no logic whatsoever. Bullets fly perpendicular, land behind you, or even zigzag in midair. Anything you hit is bound to be an accident, and also bound to ''die''.[[note]] 600 Anarchy stacks gives you a ''1,050 %'' damage increase.[[/note]]

* It got patched pretty quickly, but on release, Commandos could retrieve other Commando's turrets. This may sound like a trolling tactic, but with the Double Up talent you could literally make infinite turrets, because retrieving a turret automatically starts the cooldown of throwing another turret for both the person who originally owned the turret (because it's now off the field) and the person who retrieved the turret (because the game did not distinguish if the turret retrieved was his or not, and it ''assumed'' his turret was now off the field).
** A Commando with at least one point in Expertise can increase his movement speed to an absurd degree if he equips a weapon from the ground (hold the interaction button) while aiming down the sights with his current weapon. For some reason, Expertise's increase to movement speed while aiming is then applied to general movement and can be repeated to increase movement speed again. It's amusing to watch Axton zip around the map faster than a boosting Runner, but InertiaIsACruelMistress applies, making navigating around hazards far more difficult.
* Michael Mamaril, a tribute character with a 10% chance to spawn in Sanctuary and hand you decent loot, appeared 100% of the time on the console versions of the game before the first big patch.

* If you get Gaige's Anarchy up high enough (>550, only possible with the Slayer of Terramorphous) and use a weapon that's low-accuracy to begin with (less than 30), her accuracy will apparently make a RealityBreakingParadox, break the game, and enter the territory of EpicFail. The targeting reticule (which should, at this point, be the entire screen) will shrink to a pinpoint, but instead of being incredibly precise the bullets will follow no logic whatsoever. Bullets fly perpendicular, land behind you, or even zigzag in midair. Anything you hit is bound to be an accident, and also bound to ''die''. [[note]] 600 Anarchy stacks gives you a ''1,050 %'' damage increase. [[/note]]
* There's a Unique gun called Evil Smasher[[note]]"Evil will be SMASHED!!! WITH SMASHING!!! EVIL!!! SMASH!!! ER!!!"[[/note]], a middlin'-meh gun itself for [[JunkRare a blue rarity]], but has a special effect; when reloaded, it has a chance to gain accuracy, damage and a larger magazine size, until the next time it's reloaded. The effect is displayed by an explosion on the reload. It's supposed to apply the effect then remove it, leaving it with the temporary buff. If you interrupt the reload during the explosion by switching to a different weapon, it 'infects' all the slots and now all weapons get the buff, which stacks and does not go away. Fire a shot, reload the weapon, and it gets more powerful, more accurate and a larger magazine. [[http://youtu.be/Q8Iv0_e8WM8?t=8m49s This video]] shows the Infinity pistol, which normally has a magazine size of 1 (it doesn't use ammo normally) with a mag size of 477, and shows him afterward taking down a raid boss that is normally a minutes-long fight in less than five seconds. Furthermore, this glitch works on all guns with a reload effect. Including talking guns, including one that talks on every single shot fired but has a unique line for reloading. Marvel as none of your guns shut up until you save and quit. However it has since been patched.

* For a while, you could [[LevelGrinding power-level]] by repeatedly accepting the "You Are Cordially Invited: RSVP" mission and killing Flesh-Stick over and over. This was especially exploitable in co-op, where one player would keep accepting the mission and the other would keep killing him. He would spawn every time you start the mission, and killing him would fail it, and he also gave a ton of experience when killed (probably because he's a boss character, after a fashion). And he's not much tougher than a regular psycho. You can see the problem. A patch would eventually fix this -- killing Flesh-Stick no longer nets you ''any'' experience.
* There was a bug around release that left many a player with a good giggle. Very early in the game, just after beating Knuckle Dragger and when approaching the barge, there's a point where Claptrap tries to open a Hyperion door, fails, and immediately concludes this means they're going to die, at which point Angel steps in and opens it. Occasionally, the door was known to open just fine [[WontTakeYesForAnAnswer without Claptrap responding any differently]]. The hilarity of the situation wasn't helped at all by Claptrap giving a farewell speech.
* Equipping the Rough Rider shield on Krieg prevents him from being downed by Redeem the Soul. Additionally, you will be reduced to low enough health to Release the Beast. Sadly, this was eventually patched.

* Deathtrap can phase through walls, which can be very advantageous for a Gaige solo since he could find the nereast enemy to revive Gaige should she be downed into Fight for Your Life mode. Or heck, Deathtrap in general, he's buggy to the point that a certain skill can make him replenish even the shields of the ''enemy'', or the fact that his melee attacks may not even connect against his target. Another advantageous skill that Deathtrap has is his anti-flying enemy electric beam attack - It immediately locks on and damages the target like a {{Hitscan}} and can even reach extremely far flying targets, for as long as Deathtrap notices them.
* There are also some clipping issues that make the enemies stuck within the terrain or environmental objects. These can be exploited by a player to single out enemies and take potshots without risking a close-quarters combat:

* There's a Unique gun called Evil Smasher that spawns with rather unimpressive stats for a blue rarity. However, it has a random chance on reload to suddenly get a much larger magazine and a huge boost to damage, accuracy, and all other stats. This turns an unremarkable gun into a pretty good one. However, if you switch weapons and move Evil Smasher into your inventory while it is reloading, this stat boost can now apply to any weapon you are using, and it seems to have a higher chance to occur with other weapons too! With that boost, guns that are already awesome become ludicrously, game breakingly good. However it has since been patched.

* There was a bug around release that left many a player with a good giggle. During the intro, just after beating Knuckle Dragger and when approaching the barge, you know how Claptrap tries to unlock it and instead the barge gets locked? Well, there were a few instances where the barge ''would'' actually unlock and open rather than shut itself. The hilarity of the situation wasn't helped at all by Claptrap giving a farewell speech.