+1 fer Grim Dong.

Another vote for Arcanum, which is great either way. Though note that a character can't use both magic and guns because of lore reasons, it's either or (iirc).

Also +1 for Grim Dawn in which guns are immensely fun to use.

Good ol Terraria +1 on this choice.

Good game

Project Warlock

Shadow Warrior 2013

Elex - https://www.gog.com/game/elex

Outward - https://www.deepsilver.com/en/games/outward/

Hi cybddr.

I suggest trying out "The Incredible Adventures of Van Helsing".
https://www.gog.com/game/the_incredible_adventures_of_van_helsing_final_cut

Cheers.

Bioshock as well come to think of it. Those weird elemental abilities are a lot like magic. Though, big-daddies possibly aside, it doesn't really have monsters. Except for the final boss at least.

Lots of games have this, I'm sure. Not that I can remember any/all of them. As bler144 said, it'd be a very long list, even though guns don't usually make much sense in fantasy settings (i.e., the manufacturing industry isn't quite up to the task, unless the guns are very primiitive).

A few that have yet to be mentioned (unless I missed them):

Seems to be standard for fantasy tactics games for some reason.. Just to name one: Fell Seal: Arbiter's Mark. Yeah, guns are restricted to a particular character class, but each character also has a secondary class, which could be a pure spellcaster.

Jade Empire, although there's only one gun (I think).

Legend of Heroes: Trails in the SKy/Trails of Cold Steel series, although not the "main" player character Likewise for Hyperdimension Neptunia.

Lots of console games I can think of, but I won't mention them, other than the Wild Arms series, which is mostly about gun wielders, but still in a fantasy world with magic.

Elex. Magic, laser weapons, and swords.

The Devil Inside: (here you play a human/demon combo - human uses guns, the demon uses magic)
[url=https://en.wikipedia.org/wiki/The_Devil_Inside_(video_game]https://en.wikipedia.org/wiki/The_Devil_Inside_(video_game[/url])

Nocturne: (here the character uses only guns - only the NPC partners use magic)
[url=https://en.wikipedia.org/wiki/Nocturne_(video_game]https://en.wikipedia.org/wiki/Nocturne_(video_game[/url])

Messiah: (here the magic is limited to possess NPCs, which whom you then use guns)
[url=https://en.wikipedia.org/wiki/Messiah_(video_game]https://en.wikipedia.org/wiki/Messiah_(video_game[/url])

Edit: aargh...GOG messes the links up, again.

Bloodrayne Series

Half Vampire killing all kinds Monsters (human and actual) via Guns and (Blood)Magic. First one is the best IMO.

Victor Vran