Open World

Rebel Galaxy is a swashbuckling space adventure, with action-packed combat, exploration, discovery, trade, and “negotiation” with the outlandish denizens at the edge of the known universe.

Saints & Sinners is a game unlike any other in The Walking Dead universe. Every challenge you face and decision you make is driven by YOU. Fight the undead, scavenge through the flooded ruins of New Orleans, and face gut-wrenching choices for you and the other survivors. Live The Walking Dead.

Explore a huge open game world in classic action-adventure fashion! Prove your worth by fighting through monster-infested dungeons to save the Kingdom of Blossom!

Build the adventure from Privet Drive to the Triwizard Tournament and experience the magic of the first four Harry Potter stories – LEGO style! Explore Hogwarts™ School of Witchcraft and Wizardry, learn spells, brew potions and relive the adventures like never before with tongue-in-cheek humor and creative customization that is unique to...

Train Frontier Classic is a stylized landscape building and multiplayer train riding sandbox, inspired by the fun of model railroad building. Fill a scene with miles of scale track, hundreds of props, and a personal train car setup -- then go online to share and ride your creation with friends!

The hit mobile game Interstellar Pilot 2 has come to Steam. Join the TEF forces heading to the Gatopean sector to find a new home for mankind. Play how you like in this open world space-sim developed by Pixelfactor.

SimRail is new, advanced railway simulator. Master high-speed long-distance EMU, heavy freight hauls and suburban trains. Travel 500 km of geodetic-data based real routes. Become train dispatcher and control the traffic according to the schedule or cooperate with other players on multiplayer mode.

Explore an amazing fantasy world as a magical cat! Team up with your cat crew, climb castle walls, blast magic, and hunt the six lost crown pieces to save the kingdom.

FIRST TIME ON STEAM – Based on the PlayStation®3 port of the original GameCube game, this RPG classic is finally available for PC.

Mika and the Witch’s Mountain is a fantasy adventure about an aspiring witch who delivers packages to the townspeople of a small island. Explore every cranny and soar through the sky with your magic broom.

'Jesus Christ Simulator' is a new take on the 'Superhero Simulator' game genre. You are tasked by God your Father with fixing the broken system that humans now live in. Armed with Unlimited Miracles, Flight & Superpowers, you will change the world and help its people. You are THE Ultimate Superhero!

The cult game that marked MercurySteam's origins returns; a sci-fi adventure with memorable characters, powerful ships and humor! Enjoy intense Multiplayer battles and races with ships you build.