Comment by pjc50

C++ is really not very amenable to this because every change to the contents of a class messes up your entire memory layout. "game as DLL" is definitely a viable solution to that, but so is "game in scripting engine": many games delegate a lot of their mechanics to e.g. Lua precisely because it's so easy to tweak in-engine if you just want to change a bonus from 5% to 10% and so on.