I might be able to collect some data on this but you need to be more specific. By file size do you mean source files or executable and if latter, for what platform. Then there needs to be adjustment for statically and dynamically linked libraries ... Do you count emulated ASCII too or just pure terminal goodness?
I mean emulated ASCII, but it
looks like pure terminal goodness
Nothing fancy or exotic.
My basic thought of file size is everything needed to run the game: source code (necessary?), executable, multi-platform (several executables?), that kind of thing.
If it's file size as far as the size of the download then unzipped, I think most roguelikes range from under 1.mb to around 5 mb. Some though, like Lambda Rogue and TOME 4 can be 100 + MB,
But the ones like Lambda and TOME have graphics, that's why they're large files, right?