Here's a link to join Splinterlands (My affiliate link): https://steemmonsters.com?ref=rentmoney

Here's a link to join HolyBread (My affiliate link): https://www.holybread.io?ref=rentmoney

The above are the only two that I play but there's others. You can sign up and play Splinterlands for free but they won't let you keep the rewards earned from play unless you purchase the game for $10 (Well worth it). If you sign up with my link and purchase the game let me know that you did so and I'll send you some cards that will help you win battles. Holybread is free to play. There's a premium version that cost $10. I use the free version.

I'm not sure what other ones are still around vs. being defunked. I would suggest looking through the trending page of Hive-Gaming (/trending/hive-140217) as its likely the most popular games are being talked about there.