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.
IGDB - An open video game database
Gametionary - A multi-platform video game recommendation and promotion web app.
MobyGames - MobyGames is the oldest, largest and most accurate video game database for games of every platform spanning 1979-2018.
GameFAQs - Founded in 1995, GameFAQs has over 40,000 video game FAQs, Guides and Walkthroughs, over 250,000 cheat codes, and over 100,000 reviews, all submitted by our users to help you.
Macgamestore - The first store dedicated to Mac games. Over a thousand Mac games to choose from!