DarkOrbit
DarkOrbit is one of the best Free-to-Play Space Exploration and MMO video game similar to Freelancer that lets you suit up as a Spaceship pilot. With a huge Community and fantastic game-play, DarkOrbit allows you to be part of a community having millions of online players, select and customize your online avatar, get into the game world and start exploring, engage yourself into epic real-time Combats, participate in the massive game economy and enjoy trading for goods by using both real and game currency. Combat element in DarkOrbit allows you to go against the pirating enemies, destroy their fleets of ships, recover the goods and trade them for earnings. You can always use the available resources to buy upgrades that will help you modify your ships like mounting more weapons on the Hull or installing some metal piercing laser beams etc. Eliminating the NPC Ships and defeating the enemies rewards you with various rewards and that rewards are a way to show your supremacy over the enemies. Multiplayer feature of the game allows you to interact with online players, forge alliances and go hunting the enemies as a combined force. DarkOrbit is one of the best alternatives to Freelancer, do try it out.
#1 Kerbal Space Program
Kerbal Space Program or also known as KSP is a Single-player Space Flight, Building and Construction and Simulation video game by Squad. The game is built using the updated Unity Engine and offers playability on Multiple Platforms including Linux, Microsoft Windows, Mac OS X, PlayStation, Xbox, and Nintendo Wii. The game allows the players to control a whole Space Mission Program named as Kerbal Space Program, Have a Crew of Humanoid Aliens known as Kerbals and enjoy Exploring the Space. Game’s Complex and realistic Orbital Physics helps players learn about the Hohmann Transfer Orbits (Start from a Lower Orbit and end up in a Higher Orbit) maneuvers and enjoy piloting the ship. According to the gameplay and game story, the game tasks the players to head a Nascent Space Program, Control the Kerbals (Intelligent Humanoid Aliens from an Earth-like planet Kerbin) and enjoy learning to maneuver into Space. Kerbal Space Program gameplay is divided into two main parts such as Construction and Flight, and it allows the players to construct various types of Rockets, Aircraft, Rovers, etc. Once the ships are created, the players can simply launch them into Space from in-game launch Pad, explore the Space and complete various objectives of the game. The game offers various types of mission such as Reaching to a Certain Height, Escape the Atmosphere, Reach Stable Orbit, Capture Asteroids, Create Space Stations, Visit different Planets and collect information about them, etc. With all the Space Exploration fun, Unique game Physics and mechanics, and interesting gameplay, Kerbal Space Program is a fun Space Simulation to enjoy.