Remember to check your GOG and EGS libraries for those Fallout games. All of them except FO4 have been given away at some point.
Fallout NV Ultimate was also given away by Amazon Prime.
I should note: I had all kinds of problems in particular w/ downgrading and modding Fallout 3 GOTY Epic-version w/
Anniversary Patch in particular. All kinds of weird issues w/ the downgrade and then using FOSE; namely with it not always recognizing my folder, mods, screen issues, boot issues, etc. on my 3060m laptop. Just some real weird stuff.
Had to basically ditch F3 Epic-version and go back to F3 GOTY Steam-version, using the Anniversary Patch to downgrade and FOSE for some mods; no issues since. [shrug]
I do recommend most downgrade F3 GOTY and mod it, as there's some much better UI mods and Quickloot Mods, at the very least. Let's face it: Bethesda's UI sucks and their games are better w/ Quickloot; F4 so ruined me w/ Quickloot (it's a feature already in F4) and I need it on every Bethesda Engine game now.
Same goes for utilizing Quickloot Mods and UI mods for most Bethesda games on their duct-taped engine they use on their games - Morrowind (well, there are solid quickloot mods for it out there) Oblivion, Skyrim, F3, F4 and FNV (yeah, I know, Obsidian made FNV - but they used that duct-taped engine for it).
It's also 40gb or so for F3 Epic-version there b/c it downloads every damn language version for F3 GOTY on Epic. You can ditch (delete) whatever versions you might not utilize to save space.
I'd guess if you're using F3 Epic-version and not attempting to mod at all - yeah, you'd probably be fine.
It's also 40gb there b/c it downloads every down language version for F3 GOTY on Epic. You can ditch the non-English versions or whatever versions you might not utilize to save space.