Ultimately, if you really want to find out what happened in RE2 and Code Veronica, you're best off getting copies the originals and playing those instead. They're on multiple systems (and potentially may show up on the Wii if Capcom's Resident Evil Archives series continues) so there shouldn't be much trouble finding them.
As expected, the originals are better and more authentic Resident Evil experiences, and you'll get more enjoyment-- though not multiplayer-- out of them. Darkside Chronicles, on the other hand, is best for someone who absolutely loves light-gun games and has a buddy along for the ride.
Numbered entries aside, there have been a whole host of other Resident Evil games, across multiple platforms. Here are some you might have missed.
"As a longtime fan of the franchise there are several improvements I would like to see, and after the success of Resident Evil 7 and Monster Hunter: World, Capcom seems to be making all the right decisions with their tentpole franchises. Hopefully, this will be no different." -- PlayStation Enthusiast
The top five of the best PlayStation Move compatible light gun games that have been released for the PlayStation 3.
House of the Dead 3 and 4 should be on the list. I still play Overkill on a regular basis, worth buying a move just for that game alone. The Cabela games that support move are fun too.
Is Rambo, Move compatible? And there is also Child Of Light which is sort of a shooting game.
i wish they also made light guns like the arcade ones. they r faster at aiming and more accurate..