idbeholdME: I can see another potential hitch in this plan. Some games change the saving behavior based on the difficulty. Painkiller for example becomes checkpoint only on the hardest difficulty. Or Enclave on the hardest difficulty completely disables in-level saves. There are checkpoint saves otherwise, but only stating it as an example.
Or games where you can save anywhere, but allow only a limited number of saves in a level based on the difficulty:
Hitman games
Soldier of Fortune
It's not that common, but you can still stumble upon it from time to time
That is indeed the best. Some games even include an option, where you pick an X amount of time and the game autosaves every 10 minutes for example. And they allow you to set how many of them you want the game to maintain.
Dogmaus: the existence of iron man mode does nt affect the list
if any other difficlulty allows saving
That is why I specifically did not mention games with Iron man mode as that would be a different massive list of games that allow it.
The limited number of saves based on difficulty is ambiguous. It allows saving everywhere and loading at will, but you can reach a state where you run out of them. IIRC, in the 2 examples I gave, the number is limited on all difficulties, they just determine the amount.
And as for the first category, they're not iron man either. Painkiller only disables manual saves, but checkpoints still work. Enclave still saves between levels on hard, but just disables in-level saves.
My main concern was, if and how these special circumstances would be mentioned in the doc.