KSP is great.
I'm currently playing a career mode game with my Dad; he's doing the crunchy design, administration, and flight planning/maneuver node portion, and I'm doing the nimble-fingers piloting. Science gains are set to 10%, with a starting budget of 250 science, so we'll have to do some interplanetary work. Income and expenses are scaled way down so rocket costs are the majority of the price and combo contracts+recovery are important for turning a profit while the KSC upgrades aren't ludicrous. Contract durations are also significantly scaled down so that time matters and scheduling is a thing.
Lifesupport, KIS/KAS, KCT, some houserule tweaks (fuel cells come before solar so they have *some* use, small convertotron is just on/off and produces some of everything indiscriminately, etc)
The big mods are From the Eyes of Kerbal, and Raster Prop Monitor... I'm flying all the missions from inside the capsule with the tiny window and the internal instruments, and EVAs have the camera locked to be inside the helmet.
This setup has lead to some disagreements on safety.
On one hand; I really don't want to die out there, but on the other; I'm perfectly happy flying without Pilots/SAS.
The last flight was a triple-contract mun flyby with a free return trajectory for safety. Reentry plans changed at the last second, and then there was an explosion.
I had to split attention between attitude control and stabbing MFD buttons for info, but I was able to confirm that it was just an external camera mount that had failed.
Then there was a bigger explosion. Dad was more concerned this time, but I was pretty sure I was OK because the capsule still existed and the speed was already dropping to safe levels. The engine was gone and the fuel cell died, but the chutes were still intact, and I concluded that the materials bay had imploded from the heat, fragmenting the ship in two.
One splashdown in booster bay later, and 20+ science was raked in from high Kerbin and high Mun combined.