I've been playing Weird West: Definitive (GOG version for PC). Have some thoughts on it, so...let's go!
It's as if WolfEye's game here is some kind of immersive-sim mixing ARPG/CRPG/shooter/twin-stick shooters/stealth elements into some kind hybrid game of sorts, all set in a Western setting with also supernatural stuff (monsters, zombies, creatures, etc). So far, it's a ton of fun and really cool.
So, what's its gameplay like? Well, think Fallout 1 & 2, Wasteland 2 & 3, and Arcanum in some ways (i.e. you have an overland map and you travel to certain locations you find...and can have random encounters & special encounters pop-up on you too); CRPG's (the usual decisions matter and shape the story type of stuff); Dishonored & Hitman games (stealth elements - and here, you can hide bodies, dig holes with shovels and bury the bodies, and more); twin-stick shooters (if you play it in that mode) and/or regular shooter (if you turn on regular shooter mode & zoom the camera in to stick it right behind your character) with combat all in real-time; and probably some other stuff I am trying to think of here. It's a kitchen sink kind of game, more or less - and good at all of this stuff, too.
Combat's a blast, whatever way you decide to play it, too. Usually, combat results in me sneaking around, defeating some enemies, someone catches me, and then it's an all-out shootout and war here. And yeah, the combat and shootouts can often be awesome and intense here, as there's just so much happening - and you can use environments with their stuff (explosives that do fire damage, hazardous barrels that are poison, etc.) and their hazards (like snakes that can roam in the area and bite, causing poison to you and/or enemies) to your advantage, too - think like Divinity: Original Sin games.
You have main quest & side quests to take on as whatever characters you're playing as at the time, of course. I've seen quests with freeing prisoners (which can matters later in many ways), finding items, finding secret caches/stashes, finding people, defeating people, and typical stuff of that sort - which makes sense in the Weird Wild Wild West here. You have also on Bounty Boards missions where you can go after some Wanted Men and/or Women and take them down for money, too. Some of these missions are timed, so you'll need to pay attention often to what you have for equipment (walking on the map takes more time than horses) and how it long it takes to travel to said location & get back to (to turn the quest in as finished).
Like most immersive-sims - yeah, just about everything you can interact with & do something with. You can pick up objects (like chairs, boxes, etc.) and move them. You can steal things, too - but often getting caught results in people coming after you (yeah, like a whole town, if you're in a Town!). You can cook food you find say at Camp Areas (and in Towns where Fires are at) to heal and have beds & rolling beds you can sleep in to heal-up. Each character you will play as has some skills and even some special skills particular to that character too. Some skills, you can roll over from character-to-character. You can buy Horses (which you can travel with and keep forever) or even Steal Horses (but once you steal a Horse, once you hit your next Destination, Stolen Horses just take over and leave you high & dry).
I've had random encounters here & there as a revenge factor the family and/or gang members came, after where I wiped out a gang in one missions. There's perma-death - so if NPC's join your party and die, they're done; dead. You can recruit more party members and have them join you after say from saving them or meeting them, and/or hire them (often from Saloons in Towns). Some NPC's could wind-up in your debt if you help them or save them and while during combat sometime later, some might just show-up and help you out, especially if you're in trouble...which can really help even turn the tide of a battle.
Some 4 hours in - and this game's really cool & pretty good, so far. Enjoying it a ton here - and I should note, it's really tough on Normal, and still tough even on Story (but nowhere as Tough as Normal). I could imagine how much tougher higher difficulties probably are. Having a blast here, so far.