When comparing Cities: Skylines vs Kerbal Space Program, the Slant community recommends Kerbal Space Program for most people. In the question“What are the best PC games for kids?” Kerbal Space Program is ranked 4th while Cities: Skylines is ranked 16th. The most important reason people chose Kerbal Space Program is:
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.
Specs
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Pros
Pro Large scale
At a total of 36sq.km of area to use (compared to SimCity 4), there is a large amount of room to build and play.
Pro Steady Stream of new content via DLCs
DLCs are optional, they do go one sale. Plus when a new DLC is released a bit of the content is released into the base game.
Pro Depth of field
There is a depth of field effect that will blur distant buildings, which mimics Sim City's diorama effect. It can of course be adjusted with a slider as to how much or little to use.
Pro Large Amount of Workshop Mods & Assets
With almost 150 thousand assets and mods, you can totally change the gameplay and look 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 Tons of stuff to do
Build rockets, space planes, space stations, rovers, landers, probes. Explore planets, moons, capture asteroids, set up a communications network, colonize a planet, mine for resources and much more. It can even simulate our solar system.
Pro Huge modding scene
There's a plethora of mods available that can change every single aspect of the game.
Pro Excellent construction sandbox for building and launching rockets
KSP at its core is a rocket building and launching sandbox. When creating a rocket you can place engines, fuel cells, structural elements, and even parachutes, allowing you to build a rocket in any shape and size. The end result can even look like a giant doughnut, which might be difficult to get it into outer space. Even if you fail, the entirety of the process is really enjoyable.
Pro Motivates you to learn
Kerbal Space Program puts into perspective how amazing the advancement of the human race is. It inspires you to learn our history, how we got here, and what we can do proceed.
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.
Cons
Con Resource Heavy
If your computer doesn’t have decent specs, don’t expect to be able to run this game smoothly.
Con Expensive
If you want more gameplay features, you have to buy expensive DLC, but you can get them on sale sometimes.
Con Can be difficult to glean what one has done wrong in game
Cities: Skylines has difficulty letting the player know what they have done wrong, which results in a lot of head scratching.
Con Some visuals are poorly done
While the rockets, buildings, and even the Kerbals look pretty good, the environments and particle effects are a bit lacking.
Con Steep learning curve
Kerbal Space Program is not really a pick up and play title. It can take hours just go grasp the basics and the game will keep throwing new concepts at you as you progress into space, even stuff like orbital dynamics. Because of this, it can easily take dozens of hours to truly master this game.