Best Games by Popularity: A

Anomaly 2 is a real-time strategy game that takes the tower offense concept from Anomaly Warzone Earth to a new level.. The game takes places in the years following the invasion of Earth in 2018, where the planet is overrun by alien machines and humankind is on the verge of extinction. Read the Review

Age of Empires II: HD Edition lets you explore all the original single-player campaigns from both Age of Kings and The Conquerors expansion, choose from 18 civilizations spanning over a thousand years of history, and head online to challenge other Steam players in your quest for world domination throughout the ages. Read the Review

Anno 2070 takes place in a near-future environment where climate change has forced humanity to adapt to rising sea levels that have left stretches of once-fertile land completely inhospitable. Read the Review

Age of Empires III lets you play as a European superpower bent on exploring and conquering the New World. Read the Review

Fight against alien war machines in the world's largest cities. Read the Review

Antichamber is a game about discovery where geometry and space follow unfamiliar rules, and obstacles are a matter of perception. Read the Review

Amnesia: The Dark Descent is a first person survival horror game about immersion, discovery and living through a nightmare. Read the Review

Aion is an MMOG from NCsoft in which divine beings battle for control of the skies and the earth. Read the Review

Arma II is the follow-up to Arma: Armed Assault and features new characters, improved AI, and online multiplayer modes. Read the Review

It's a suitably excellent expansion to what remains one of the best real-time strategy games to date. Read the Review

The Titans is recommendable to any fan of Age of Mythology, particularly those who liked the idea of the game but maybe had trouble getting over the learning curve. Read the Review

Asylum is a psychological horror adventure inspired by H.P. Lovecraft where you must journey through the intricate floors of the Hanwell Mental Institute, in which unimaginable atrocities have occurred in the past.

Featuring lots of interesting, inventive design decisions, plenty of fun-to-use units, and tons of variety, Age of Mythology is the last real-time strategy game you'll need for a long time. Read the Review

If you've ever liked any other real-time strategy game in this classical style, then you'll clearly see why this one deserves so much credit. Read the Review