wolfsite: Unfortunately some developers/publishers only focus on controller support, another example of this is the PC ports of No More Heroes 1 & 2 as they are also controller only. With PC handheld systems becoming more popular it would be no surprise if controller support takes priority or exclusivity.
wolfsite: Very true, another example would be Mass Effect Andromeda were you lose the ability to tilt the vehicle nose on keyboard unless you go in and remap the whole thing...... true this isn't needed to play the game normally but one achievement in the game this ability is required.

.Keys: I'd argue that you're wrong.
It really depends on how you play and if you're used to playing games on keyboard.
Forget mouse. Mouse is terrible for playing games like this because of the absurd ammount of inputs required per button.
Mouse has mostly 3 buttons, but you have at least 4 fingers that could be used somewhere else if you use Keyboard as a Fighting board controller.

With games like DMC, Rising and any fighting game on keyboard, you must rethink how you play with keyboard&mouse.
First: Forget the mouse, throw it away.
Second: Remap the controls for comfort and quick button reach.
Third: Start slow building muscle memory
Forth: If you're not fast enough for higher difficulties, play on easy or medium first.

Just have fun and experiment.

.Keys: Mass Effect is another category of gaming that requires a Mouse for playing because its mostly a shooter,
In that I agree. There are some games that require a Mouse for play that have terrible ports.

But these Capcom ports are fine for what they are.

By the way, many speedrunners use Keyboard only for DMC4...

adikad13000: It's funny you mention MGSRR, since it has proper mouse support and it is perfectly viable to play with that, also there's DMC 5, God of War 2018, Ninja Gaiden 2 Black etc. The list just goes on. But maybe you are right on the remapping part, if you're considering that I'm only wanna play DMC1 or DMC2. But not only that's not the case, for DMC 3 & 4 not being able to use certain combos is just no acceptable for me.

adikad13000: It's funny you mention MGRR, since it has proper mouse support and it is perfectly viable to play with that, also there's DMC 5, God of War 2018, Ninja Gaiden 2 Black etc. The list just goes on. But maybe you are right on the remapping part, if you're considering that I'm only wanna play DMC1 or DMC2. But not only that's not the case, for DMC 3 & 4 not being able to use certain combos is just no acceptable for me.

GOG.com: Time to rock. Devil May Cry titles are here!

Robette: Ok, guess it basically says so in the initial post, but I have seen various complaints about the state of the port on steam. I take it, this is basically the fixed version and those complaints don't apply?

Also, might be a silly question for a series like this, but is there any argument to be made for playing these in order or could/should I just pick one (possibly even 4 or 5)?

sekoku: ...Do they have the Engima Malware that every Capcom title has on Steam though? My purchase is hovering on that because if they do: hard pass.