Valve's recently released Portal 2 has suffered a protest from fans on metacritic, as users sabotage the User Score with low ratings and complaints against the game - despite it being the highest rated game of the year so far according to critics.Most of the protest is focused around the PC version of Portal 2, with fans giving out low scores as they complain about supposed consolification, a short game length and the controversial ARG that ran ahead of Portal 2's release.Portal 2 was released early on some platforms as part of the climax of an alternate reality game Valve was running, but many players have expressed anger due to the way the ARG pushed players to buy unrelated games from the Steam store.Portal 2 specifically has come under fire for supposed consolification and the addition of an in-game store already littered with optional content and character accessories for the co-operative campaign. Users have also complained about frequent level loading, though this seems to be more a limitation of the Source Engine rather than evidence of a console port. Metacritic's User Score for the PC version of Portal 2 currently sits at 6.7, while the Critic's Score sits at 94/100. You can check out our own Portal 2 review to see what we think.Check out the Portal 2 video below, then let us know what you think in the forums