While not being a really complex game, Slay the Spire is very challenging, fun and creative. This makes it a really good roguelike in my opinion.
There are a LOT of challenges you can accomplish (such as steam acchievements), aswell as community challenges (every day updates) for the ones who really enjoy playing this game without stop.
This game helped me in very hard moments (I find it quite relaxing and demanding at the same time, which makes anxiety go away) and that is why is one of the best games of all time for me.

When I pick this game up, it absorbs me every time. Crafting your deck each run, choosing your path to manage encounters, health, shops, feels like just the right amount of risk taking to tickle my brain.

The problem for me lies when I put the game down. It takes months for me to bother picking it back up again, but I think that is just my feelings towards rogue-likes. They are fun every now and then, but I will have to content myself with never really finishing these types of games.

Should've bought it on my phone, I think it would be excellent there.