Want to drive a TELSA car,
Tesla Motors Simulator
or have some fast fun fragging
or try exploring the dark side of machines
Submachine Universe is probably the first ever MSO (massively singleplayer online) created in 2010, extended ever since. You can freely travel between different locations, read theories about Submachine and observe how things work inside this network. There are locations that you might recognize from previous games, there's a lot of new yet undiscovered content, there are even locations that you think you know, but they're somehow different. Surely worth a look. The best part - it's an open project, which means I can add more locations later on and it will all work together smoothly. So, tinfoil hats on and start exploring if you dare, because there are some dark places inside.
[meanwhile, seven years later...]
In January of 2017 this project stopped being "online" and morphed into "free HD downloadable", and here we are.
or take a ride with ghosts
Yûrei Station ("Ghost Station")
Yûrei Station ("Ghost Station") is an adventure game inspired by Japanese ghost stories. It was written and designed by Atelier Sentô, based on memories of their life in Japan, and on the trains they used to take at dawn.
The graphics were hand-painted with pencils and watercolors by high school students. It was done in 2 days (March 6 and 7, 2017) during a workshop at "le Pôle des Arts" of La Joliverie in Nantes.
Learn more about the making of this project:
Hand drawn old style anime graphics this looks absolutely delightful.
So you don't need Steam or any other such like encumberence to have fun, you do not even need any loot.