Are there any other games like Act 2?

[KatMahan]

Preferably on Steam. I seem to only find Roguelikes and Slay-the-Spire clones. Am looking for a singleplayer CCG.

[Therion]

Have you tried Shadowverse? It's mostly multiplayer but it has a story mode as well.

[arsenicBumpnip]

Card City Nights and Card City Nights 2 are both fantastic solo CCGs -and- both on Steam:
https://store.steampowered.com/app/271820/Card_City_Nights/
https://store.steampowered.com/app/241300/Card_City_Nights_2/?curator_clanid=6958141

There's also the Mega Man Battle Network games and their spiritual sequel One Step From Eden
https://store.steampowered.com/app/1798010/Mega_Man_Battle_Network_Legacy_Collection_Vol_1/
https://store.steampowered.com/app/960690/One_Step_From_Eden/

Though while card-collecting and deck-building are essential elements of those games, the actual fighting is done in real-time, with you drawing from your deck every 15-seconds-or-so to figure out what attacks you'll have available in the next 15 second "turn".


Non-Steam but can easily be run on an emulator:
Pokemon Trading Card Game for the Game Boy Color is one I've always considered a classic. There's also a Japan-only sequel that has an English-translated ROM.

There's also Yu-Gi-Oh Worldwide Edition - Stairway To The Destined Duel on the GBA, which I've always considered one of the best singleplayer adaptations of YGO, as well as YGO The Sacred Cards and YGO Reshef Of Destruction, tho from what I remember those latter two do some weird simplifications with the YGO ruleset that make the gameplay worse rather than better.