Beginner, Normal, Realistic. I propose that at some point you consider adding difficulty levels into the game. This could increase the age range of gamers and give people a much harder challenge if desired. For instance my kids like the game but it is very difficult for them to design a ship that actually flies much less get into orbit. Personally I am finding that its becoming easy to do anything without mods that make it harder. Right now I don't see much that you could do short of adding a multiplier for how much science you generate in career mode. For instance on beginner a surface sample on Kerban might give 10 science, on normal maybe 5 and so on.. But as you start implementing a lot of the features that are planned I can see a lot of places where you can make things easier or harder depending on what we are looking for in game. Here are just a few suggestions but this could quickly be expanded into all current and future areas of the game. Beginner -Very easy to get science. Increase multiplier to maybe 2x and be able to unlock the entire tree by just visiting Kerban and 1 moon. -Have future Kerbans suggest where you can go to get more science or provide contracts for it. -Parts and equipment could be more rugged to survive collisions or harder impacts. -No deadly re-entry -Capsules or pods float in water. -Reduced atmosphere mechanics / physics -Easier flight and control in general. Normal -Normal science multiplier. -Very vague recommendations or contract on where to go. -Normal strength for parts. Realistic -Reduced multiplier for science. Force them to visit most of the outer planets to be able to unlock the entire science tree. -Limited kerbals and perma death. -No reverting after your rocket explodes. -Realistic atmosphere mechanics / physics. -Realistic flight and control. -Stuff sinks if you land in water (without parts to make you float)
