Interested in some (mostly) free to play games? Here are some recommendations to get you started. 

Top 20: Adventure Capitalist (http://store.steampowered.com/app/346900/)

Welcome, eager young investor, to AdVenture Capitalist! Arguably the world's greatest Capitalism simulator!

Top 19: Metro Conflict (http://store.steampowered.com/app/356640/)

Metro Conflict delivers a new generation of shooters to the world of free-to-play. Choose between various character classes, each with their own unique skills and weapon sets, to showcase your abilities in a fast paced, high adrenaline battlefield!

Top 18: Star Trek Online (http://store.steampowered.com/app/9900/)

In Star Trek Online, the Star Trek universe appears for the first time on a truly massive scale. Players take the captain's chair as they command their own starship and crew. Explore strange new worlds, seek out new life and new civilizations, and boldly go where no one has gone before.

Top 17: Marvel Heroes 2015 (http://store.steampowered.com/app/226320/)

Marvel Heroes 2015 is the premier Marvel MMO-ARPG that you have been waiting for! Play as the Avengers, Guardians of the Galaxy, X-Men and more. Battle infamous villains such as Dr. Doom, Loki, Magneto to save the universe.

Top 16: Dota 2 (http://store.steampowered.com/app/570/)

Dota is a competitive game of action and strategy, played both professionally and casually by millions of passionate fans worldwide. Players pick from a pool of over a hundred heroes, forming two teams of five players.

Top 15: Robocraft (http://store.steampowered.com/app/301520/)

Build insane Robot Battle Vehicles that drive, hover and fly; add weapons from the future and jump in the driving seat as you take them into battle in a team based capture the base Free-to-Win MMO.

Top 14: Unturned (http://store.steampowered.com/app/304930/)

You become a survivor in the zombie infested ruins of society, and team up with your friends to remain among the living.

Top 13: Survarium (http://store.steampowered.com/app/355840/)

Survarium is a post-apocalyptic online FPS game. If you are looking for a shooter where skills matter, look no further! The opposing players and deadly anomalies will never stop you on the way to victory, right? Then start playing now for free!

Top 12: No More Room in Hell (http://store.steampowered.com/app/224260/)

"When there's no more room in hell, the dead will walk the earth." A tribute to the highly acclaimed film series in which the above quote originated from.

Top 11: APB Reloaded (http://store.steampowered.com/app/113400)

The world’s first and premier Action MMO Third Person Shooter allows you to choose between two sides of the law. Play as Enforcer or Criminal, customize your gear for the task at hand and hit the streets and play how you want in a city filled with more action this side of a Hollywood blockbuster.

Top 10: Strife (http://store.steampowered.com/app/339280/)

Strife® is a truly free to play, competitive, online ARTS / MOBA that features non-stop action and engaging combat. Take control of powerful and versatile heroes, each capable of dominating in unique ways, and exert your will in an epic battle between two teams.

Top 9: War Thunder (http://store.steampowered.com/app/236390/)

War Thunder is a free-to-play, cross-platform MMO combat game for Windows, Linux, Mac and PlayStation®4 dedicated to military vehicles used in the World War II and the Korean War periods. Fight in major air, land, and sea battles, with international players in an ever developing environment.

Top 8: RIFT (http://store.steampowered.com/app/39120/)

Choose your side. Fight the invasions.

Top 7: Loadout (http://store.steampowered.com/app/208090/)

Loadout is an outrageous new multi-player shooter that’s all about the guns, baby! Build a massive variety of absolutely insane weaponry - billions of combinations - totally customized, totally unique, and totally deadly.

Top 6: Defiance (http://store.steampowered.com/app/224600/)

Join thousands of players in Defiance, the Free-to-Play shooter MMO that defines MASSIVE CO-OP. Wield customizable weapons as you hunt for alien technology across a transformed Earth, and experience an evolving TV/MMO story with crossover content that expands the Defiance universe.

Top 5: PlanetSide 2 (http://store.steampowered.com/app/218230/)

Join an all-out planetary war, where thousands of players battle as one in strategic, targeted missions against opposing empires. Utilize infantry, air and ground vehicles to destroy your enemies in this revolutionary, massive scale, first-person shooter.

Top 4: Neverwinter (http://store.steampowered.com/app/109600/)

Neverwinter is a free, action MMORPG based on the acclaimed Dungeons & Dragons fantasy roleplaying game. Epic stories, action combat and classic roleplaying await those heroes courageous enough to enter the fantastic world of Neverwinter!

Top 3: Nosgoth (http://store.steampowered.com/app/200110/)

Humans versus Vampires in brutal team-based PvP battles. 

Top 2: Warframe (http://store.steampowered.com/app/230410/)

Warframe is a cooperative free-to-play third person online action game set in an evolving sci-fi world.

Top 1: Path of Exile (http://store.steampowered.com/app/238960/)

You are an Exile, struggling to survive on the dark continent of Wraeclast, as you fight to earn power that will allow you to exact your revenge against those who wronged you. Created by hardcore gamers, Path of Exile is an online Action RPG set in a dark fantasy world.