Valve released a Halloween event last year called Diretide for DOTA 2
It was hinted it could be an annual event like Team Fortress 2's Halloween events (now 5 years running). But never actually confirmed.
Halloween passed this year and no new event lead to some extremly angry fans:
In-game matches led to teams losing on purpose hoping to get Valve's attention
DOTA 2 Twitch was flooded with chat emotes, as well as the main websites of DOTA 2, Valve, Volvo and Barack Obama's facebook
༼ つ ◕_◕ ༽つ Give DIRETIDE: ༼ つ ಥ_ಥ ༽つ DIRETIDE ༼ つ ◡_◡༽つ DIRE TIDE
/╲/╭(◕◕◡◕◕)╮/╱ BROODMOTHER WANTS DIRETIDE
༼ ᕤ◕◡◕ ༽ᕤ Punch Volvo for the diretide
༼ つ ◕_◕ ༽つ=ε/̵͇̿̿/’̿’̿ ̿ ̿̿ ̿ Give DIRETIDE
̿ ̿ ̿ ̿'̿'̵͇̿̿з=(◕益◕ )=ε/̵͇̿̿/'̿̿ ̿ ̿ ̿ ̿ ̿ GIVE DIRETIDE VOLVO NOW
Wiki articles were defaced
Also the Metascore reviews were hammered with negative user reviews (originally the user score was a 8.5)
http://www.metacritic.com/game/pc/dota-2
Submitted on Know Your Meme.com with various pictures and gifs
http://knowyourmeme.com/memes/events/diretide
BTW I don't play this game, and play TF2 religiously, and find this extremely over rated
