IGDB - An open video game database
Mac Games Arcade - The first and only store application dedicated to Mac games.
FreeToGame - Your digital game store where everything is free!
Metacritic - Metacritic aggregates music, game, tv, and movie reviews from the leading critics. Only Metacritic.com uses METASCORES, which let you know at a glance how each item was reviewed.
The Visual Novel Database - VNDB.org strives to be a comprehensive database for information about visual novels.
Gametionary - A multi-platform video game recommendation and promotion web app.