Most annoying things in video games

[The Wandering Magus]

power drain abilities...

[Teal Turken]

Speed Runners.

"Guys help! The hunter's got me! Where are you going?!" *dies*

"Hey there's a med-kit here! Guys? Don't you want this med-kit?" *left far behind*


At least in Borderlands it means you get all the loot for no effort.

[Asterian Starfall]

This one perhaps is the most annoying thing that has happened to me that is video-game related:

Waiting for LoE to come out 

[The Wandering Magus]

loot ninjas

[Dark Hooves]

spawn hunters

[Azure]

Worms World Party's online lobbies.
Either you got a room full of people who just said "rules" or a room with one person with awful internet.

[The Wandering Magus]

trolls and gold farmers.

[FlameandIce]

when you only have no energy cells left in Shadow of Destiny and you are stuck in the past

[The Wandering Magus]

stuck at half health, rooted, stunned, and shot full of fire arrows.

[Howitzer]

When the AI's in an offline game randomly look around and hesitate to shoot another AI, but when it comes to fighting you, they immediately lock onto your head let loose their entire clip no matter how far away they are.

[The Wandering Magus]

when you run out of ammo...

[Tiger]

when you run out of ammo...

All my THIS.

I'm fighting an enemy pyro and all of a sudden it switches me to my Detonator, and I realise that I'm out of ammo. 

[FlameandIce]

when you run out of ammo...

especially in games with very scarce ammo

[The Wandering Magus]

when there's four sappers going off at once, and you have to choose which to save.

[Teal Turken]

when there's four sappers going off at once, and you have to choose which to save.

Dispenser because then I can rebuild quicker.

When your team is so bad you can't leave the base for 5 seconds.
When the enemy team has 4 soldiers and 3 medics. (Uber charge much?!)

[Book Smarts]

Foreign language speakers in a game that requires team communication

[Teal Turken]

Foreign language speakers in a game that requires team communication

Spanish players on the north american League of Legends servers.

[The Wandering Magus]

when the other team has banished-good snipers everywhere.  EVERYWHERE.

[Julius]

Foreign language speakers in a game that requires team communication

Spanish players on the north american League of Legends servers.

Hey!

[Pipkin]

when you run out of ammo,

....then try to switch to your sidearm to silence a foe, only to pull out rather useless grenades, resulting in your immediate demise