IGDB - An open video game database
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.
FreeToGame - Your digital game store where everything is free!
OpenCritic - OpenCritic is basically a community-based website that aggregates the news, reviews and views on a game on a single platform.
The Visual Novel Database - VNDB.org strives to be a comprehensive database for information about visual novels.
whatoplay - Game discovery made easier.