Infinity Engine is what BioWare's Baldur's Gate series runs on. Despite being a fairly robust engine for Dungeons & Dragons, it is still full of bugs. As the different games use varying versions of the engine, it will be noted which games can carry out each glitch.

Dimension Door Quick Travel

Variant 1

Cast the Dimension Door spell and leave the area before the spell is finished. In the new area you'll be placed at the coordinates at which you would have been placed in the old area (check by pressing l or x). Addionally, maps sometimes have different coordinate systems, which can make this trick highly effective.

Variant 2

Cast the Dimension Door spell and leave the area before the spell is finished. The area you're leaving to must create an autosave. Then reload the autosave. The character will be misplaced at position (0,0) (or the nearest possible if blocked).

Speedrunning Uses

• In Baldur's Gate to get into BG-City while the bridge is still raised
• In Baldur's Gate to quickly zone up the north-east and north parts of BG-City
• In Baldur's Gate to get in and out of Candlekeep before chapter 6
• Numerous times in Baldur's Gate and Icewind Dale to skip too much walking

Example video

Dimension Door Area Transition

When the Dimension Door spell is targetted at the caster itself, (s)he moves a tiny bit, depending on the position of the mouse click in the character's circle. This can be used to move the character closer to a wall, not normally reachable by simply walking towards the wall. This has been successfully used in Baldur's Gate I to trigger the area transition of the palace without opening the door. See this video

Item Recharge

Simply sell the charged item and buy it back. The item is then completely charged to the maximum number of charges.

Talk Lock

When an NPC has a blue circle (meaning they are neutral and not immediately hostile), pause, talk to them, then give a different command (like move to a different location) and unpause. The NPC will be waiting for your character to talk to them, and will not perform any action until one round goes by. You can repeat talking to them as many times as desired. This can be used to kill the most powerful enemies in the game with no resistance, as long as they are initially neutral (blue circle).

Also note that this glitch instantly rotates the targetted NPC to face the talk-locking character, which may be helpful in setting up a backstab.

Speedrunning Uses

• Killing various bosses (Bohdi, Sarevok, Aran Linvail, Gaelan Bayle, etc.)
• Running past NPCs that would otherwise delay you (e.g. the dryads and shadow thief in Irenicus's lair)
• Skipping the Severed Hand cutscene in Icewind Dale 1
• Protecting the Dukes from the Arrows of Detonation in the Duchal Palace (current Baldur's Gate ToSC multi segment route)