OpenRCT2 is a game add-on designed to add new features, fix bugs, raise game limits and add multiplayer co-op to Rollercoaster Tycoon 2. The original game needs to be installed.

OpenLoco is an Open Source re-implementation of Chris Sawyer's Locomotion, a construction and management simulation video game that simulates running a transport company.

Simutrans is an open-source transportation simulation game.

OpenTTD is an Open Source simulation game based on Transport Tycoon Deluxe.

Transcendence features space combat and exploration in a vast and dangerous galaxy.

SSVG (Solar System Voyager) is a simulation software that allows you to fly spacecraft in the solar system. Each spacecraft has three propulsion systems: a chemical propulsion engine, an electric propulsion engine, and a solar sail.

Stranded II is the sequel to Stranded I, where you face the struggle for survival again. However, this time there is much more to discover and to explore compared to the prequel.

Muscle World is a quirky indie game where you strive to build muscle.

No Time is a simulation game with similarities to Back to the Future complete with a DeLorean.

Crash World is a recklessly funny driving sim where you play as a pizza delivery guy avoiding the cops and basically doing whatever you want.

Train Director is a clone of the popular Train Dispatcher simulation software. With Train Director you can simulate the work of the Centralized Traffic Control (CTC).

BEYOND: The Static is an indie developed game that is designed to scare you.

Nightmare Fishing Tournament 3D requires you to catch a specified fish before the round is over. Catch the heaviest fish to win the round, and the fisherman with the most points at the end gets to return to the "Land of the Living."

RiftSpace is a space exploration, combat game for Windows first released in 2004 by StarWraith 3D Games and released as freeware in 2008.

Battlecruiser 3000AD is a science fiction video game that was eventually released as freeware after a long and very public development process.

Danger from the Deep is an OpenGL World War 2 German submarine 3D simulation featuring multilanguage support, multiplatform support, and advanced sound and graphics.

Perfect Heist is a game under development where you play either cops or robbers to execute or prevent the perfect bank heist against other players.

Wing Commander 1 Remake uses the Flight Commander game to recreate the original Wing Commander 1 with 3D graphics.

Privateer Gemini Gold is a fan-made remake of the Privateer series of Wing Commander.

Vega Strike is a 3D OpenGL Action Space sim allowing players to trade, bounty hunt, or explore in a vast universe.

Flight Commander is a space combat game in the style of Wing Commander.

Presentable Liberty has you imprisoned without being told why. All you can hear day in day out is the faint ticking of a clock in your cell. That is until the first of 5 fateful days begins.

Race Into Space is a space simulation game launched from the boardgame Liftoff!

SpaceCombat is a space simulation game, like TIE Fighter or Descent Freespace.

LinCity-NG puts you in charge of building and managing the economy of your up-and-coming city - build it right and everyone prospers.