I've been trying to replicate the Voices of a Distant Star scenario in Aurora. That's mostly working fine, which is a nice testament to its flexibility, but there's one little glitch that would be nice to fix.
In VoaDS, trans-newtonian technology (well, their equivalent) was discovered in a dig site on Mars. A bunch of suspiciously-acting aliens then proceeded to kill most of the excavation team, most likely so they'd.. ah, but that would be a spoiler.
In any case, the implication is that they got there without trans-newtonian engines. Now, I could just ignore the early part and start the scenario off just afterwards - the martian colony was destroyed, after all - but it would be fun to have a traditional rocket engine that could get them there. Of course, it'd have to consider inertia and hofmann transfer orbits, so it's probably more trouble than it's worth - but if you were already pondering something like this, here's an extra reason to do so.
(To be honest, though.. trying this in Aurora is a sideline. The reason I found out about Aurora in the first place is that someone told me it looked similar in goals to the simulator I'm working on for the purpose. Aurora is much farther along, though. We'll see.)