Metroidvania games.

Personally, I love them ^_^ And indeed, I've been finding Chasm enjoyable as well.

There are many great titles, as the genre has been very well explored, but here are some of my favorites...

https://store.steampowered.com/app/367520/Hollow_Knight/
https://store.steampowered.com/app/588650/Dead_Cells/
https://store.steampowered.com/app/387290/Ori_and_the_Blind_Forest_Definitive_Edition/
https://store.steampowered.com/app/535480/Sundered_Eldritch_Edition/
https://store.steampowered.com/app/774361/Blasphemous/

Aquaria
Axiom verge
Gungirl 2
Timespinner
Unepic
Castlevania (GameBoy advance, use emulators)
Metroid Fusion (GBA too)

https://store.steampowered.com/app/1104660/MOAstray/

https://store.steampowered.com/app/916730/Gato_Roboto/

https://store.steampowered.com/app/302790/Momodora_III/
https://store.steampowered.com/app/428550/Momodora_Reverie_Under_The_Moonlight/

And this one if you want something different :D

https://store.steampowered.com/app/334940/Yokus_Island_Express/

Absolutely love the genre. The unfolding of the map as you unlock more abilities that let you traverse areas previously unavailable is just such a satisfying loop to me as well as the close encounters melee combat that many of them feature. My favorites are Castlevania Symphony of the Night, Hollow Knight, and Ori and the Blind Forest. SOTN is a legendary game that still stands the test of time with its timeless visuals, engaging gameplay, evocative orchestral music, and genius level design(and some terrible voice acting that carries a certain charm :P).

Hollow Knight though absolutely blew me away and it topples SOTN for me as my personal favorite of the genre. It just excels on every level and has the luxury of looking at past games of the genre while implementing new ideas and mechanics and expanding already existing ones. It's got a lot of SOTN, some Souls elements and level design, and such an ominous yet beautiful atmosphere with a world oozing with character and mystery that'll reward you for being inquisitive when it comes to talking to NPCs and exploring the world. The game offers a great challenge as well. Definitely very difficult at times, but never unfair imo. I just can't damn wait for Silksong(sequel).

Ori is absolutely beautiful as well with a great soundtrack. There is some ranged combat, but it's a bit more platforming heavy than the other two(an amazing platformer at that). Game really tugs on the heartstrings too. A great choice as well with a sequel coming out next year.

But above all else, if you enjoy metrdoivania's you really owe it to yourself to give Hollow Knight a try, I'm sure you'll love it :). I personally believe it to be the pinnacle of the genre.

https://store.steampowered.com/app/252030/Valdis_Story_Abyssal_City/
https://store.steampowered.com/app/275390/Guacamelee_Super_Turbo_Championship_Edition/
https://store.steampowered.com/app/283640/Salt_and_Sanctuary/

I really like the genre. Also some good examples; aside from mentioned above
https://store.steampowered.com/app/340000/Headlander/ - This one is from my wins and has a cool mechanic to change bodies.
https://store.steampowered.com/app/393520/Iconoclasts/ - Haven't bought it yet but i will.
https://store.steampowered.com/app/252030/Valdis_Story_Abyssal_City/ - This game is hard but it's so well done.
https://store.steampowered.com/app/535480/Sundered_Eldritch_Edition/ - This one is also good but i didn't like it towards to end.

Also I am really interested in Chasm too. If i win from SG i will play it also.

Big fan of the genre.

• Dead Cells (albeit is somewhat different in its mechanics)

• Hollow Knight (one of the best games of this decade)

My favorite's are already mentioned above by others but I would like to add:

• Dust: An Elysian Tail
• Owlboy

I think my favorite Castlevania is Circle of the Moon.

Bloodstained: Ritual of the Night
Bloodstained: Curse of the Moon

I was really hyped about Chasm back when they had a kickstarter going for it. The hype died over the years but I was happy to see it in the bundle. I actually started playing it today and so far I like it.

I haven't played a lot of metroidvanias (but I will eventually since I've gotten several good ones now) but my current favorites are:

Dust: An Elysian Tail which has amazing artstyle and animations. Combat and gameplay were pretty great too, as well as pretty much everything else about the game. It's a masterpiece, it really is.
Gun Girl 2 is a free game I played very long time ago when it wasn't on Steam. I remember it being quite fun, with good level designs and enjoyable carnage.
Yoku's Island Express which is a quite unique take on the genre where pinball mechanics are your main means of progressing through most of the game. It has amazing artstyle and is pretty interesting. I did quit playing this one though because I don't like some mechanics that were introduced later on, like swinging which goes way too fast for me so I often screw those sections up.

Pretty tough cookie (well, at least some parts for me), but overall a really well crafted game with amazing graphics and music:

https://store.steampowered.com/app/449610/Monster_Boy_and_the_Cursed_Kingdom/

Edit: And it's on sale right now ;)

My favorites are Dust: an Elysian Tail, Owlboy, Dead Cells, Hollow Knight and Ori and the blind forest.
Those are the recurrent answer you'll get for this genre

Here are some more metroidvania that I personally enjoyed and didn't see mentioned by others:
a robot named fight
ghost 1.0
Aquaria
rogue legacy

Won't spoil anything.
So I just finished Indivisible https://store.steampowered.com/app/421170/Indivisible/ Also watch this soundtrack-trailer if you like https://www.youtube.com/watch?v=H08y7_AFygU

I think anyone who claims to like the genre and hasn't played La-Mulana is a coward :^)

I like the genre. Most popular titles are already mentioned so I wil just add this:
https://store.steampowered.com/app/249590/Teslagrad/

I forgot to add in that I'm also having fun with Blasphemous. It's not easy but still a good game.

Still trying to trade for that spare for my friend, but I digress. Damn ST.

Metroidvania is without question one of my favorite genres, if not my overall favorite. I'm in the process of finally finishing up Hollow Knight in preparation for Silksong (just got a couple of endgame things to wrap up and tackle the Godmaster DLC), and it easily places into my top 5 games of all time.

I struggled a bit to find suggestions, as most of the ones that I enjoyed have already been mentioned, but I would be remiss not to mention The Messenger and Cave Story, two fantastic titles that should not be missed.

https://store.steampowered.com/app/764790/The_Messenger
https://store.steampowered.com/app/200900/Cave_Story

Edit: adding a couple more I thought of that I liked.

https://store.steampowered.com/app/460700/Song_of_the_Deep
https://store.steampowered.com/app/356650/Deaths_Gambit
https://store.steampowered.com/app/401360/The_Aquatic_Adventure_of_the_Last_Human/ (For me, this one just barely ticks the box to be considered Metroidvania; I'd say it's about as much of one as, say, Titan Souls or Shadow of the Colossus. Still, I found it to be decently enjoyable and worth picking up, though I would only recommend doing so when it's on sale.)

Some are better than others, that's for sure.

Axiom Verge was pretty good, but not everyone will like the weird sci-fi meets hindusim themes.
Strider (2014) is a lot more action-focused than most, but is a good game too.
Shadow Complex gets a lot of credit for revitalizing the genre.
Bloodstained: Ritual of the Night is solid, but most of the fun there is seeing what sort of ridiculously over-powered combos you can find.
La-Mulana 1 and 2 have a strong focus on puzzle solving, and I dare anyone to finish them without using a 3rd-party guide. (You will be writing your own if you want to succeed...)

https://store.steampowered.com/app/262960/Castle_In_The_Darkness/

I recommend it. Full of secrets and references to the 8-bits era. Hard as hell, though.