When comparing 0 A.D. vs Kerbal Space Program, the Slant community recommends Kerbal Space Program for most people. In the question“What are the best games on Linux?” Kerbal Space Program is ranked 11th while 0 A.D. is ranked 21st. The most important reason people chose Kerbal Space Program is:
There's [a plethora of mods](http://www.slant.co/topics/706/~what-are-the-best-kerbal-space-program-mods) available that can change every single aspect of the game.
Ranked in these QuestionsQuestion Ranking
Pro Free, Real-Time Strategy title actively being developed
Still currently in development, 0 A.D. is currently in Alpha stages and completely free. For those willing to wade through the multiple bugs, essentially testing the title, this game will scratch the itch of any RTS fan on a shoestring budget.
Pro Code is open-source
Even if the current developer team chooses to no longer work on the game, others can keep contributing to the source code and modify it.
Pro Multi-platform support
The game will run on any Operating System, whether it be Linux, OSX, or Windows, which is great for people who dual-boot or use multiple OS's across their devices. No matter the OS used, one can install and play this game.
Pro Straightforward RTS gameplay
0 A.D. brings recognizable, straightforward, Real-Time Strategy gameplay to the players. With a mini-map in the bottom corner, resources shown in a bar at the bottom, and unit selection through double clicking, all of the major elements found in most RTS games is here, making for a very familiar game for those that are used to the genre.
Pro Active development
By being in active development the game allows for frequent bug fixes as well as frequent new content. While it is still in alpha, the state of the game playability is pretty good with new features being added all the time.
Pro Addictive Age of Empires style gameplay
This game can be seen as a spiritual successor to Age of Empires, thus it will provide similar gameplay to those who are familiar with the AoE series.
Pro Huge modding scene
There's a plethora of mods available that can change every single aspect of the game.
Pro Teaches orbital dynamics & rocket design fundamentals in an accessible manner
The physics engine does a reasonably accurate job of replicating the fundamentals behind both orbital dynamics and rocket design, so by going through the tutorials and experimenting, you're actually learning some real rocket science.
Pro You don't get bored with it, and you will learn a lot
Build rockets, space planes, space stations, rovers, landers, probes. Explore planets, moons, capture asteroids. With the addition of mods you can even test warp drive, set up a communications network, colonize a planet, mine for resources and much much more. It can even simulate our solar system (the in-game one is very similar, although smaller to encourage new players.
Learn orbital mechanics. Inspire yourself to learn about space and space travel history of human. This game is not only fun - it is inspiring.
Pro Construction sandbox for building and launching rockets
Kerbal at its core is a rocket building and launching sandbox.
Pro NASA working on a mission pack for the game
While not released yet NASA is working on a mission pack for the game.
Pro In constant development
KSP is a shinning example of early release done right. The currently available game is fun to play, and the developers are constantly adding new major additions.
Pro Fun sandbox mode to experiment with rocket designs
The rocket designer lets you experiment with as many different rocket designs as you can think up. The designer is based on components such as engines, fuel cells, structural elements and various other items such as parachutes.
Con Currently in alpha
0 A.D. is an ongoing open source project that is as of yet feature complete.
Con Steep learning curve
Kerbal Space Program is not really a pick up and play title. There is much to learn before grasping the core concepts of the game,
Con Graphics are not the most detailed
The graphics of KSP are not the most detailed but they work non the less.