unfortunately, they didn't bother to add proper controller support. they are just directly the original PC versions released many years ago. they do detect controllers, but they only will read digital buttons and not analog. so, any modern PC controller doesn't work properly (the RT/LT triggers on the 360 controller aren't functional, for example).
its a shame they did not bother to give the games actual, up-to-date, proper controller support. would have bought them. its makes the games unplayable. SR1 doesn't even have mouse support, playing that with just the KB is very aggravating.
so, can they fix this with a patch? if they where gonna bother to re-release them on Steam (and for $4 more than the GoG versions), why not add Xbox 360 controller support, allowing them to be fully mapped to one's own preference?