Reino (2019)

Both are:
- about zombies
- Netflix drama

Be sure to watch season 2 of Kingdom too!
Kingdom is set in Joseon, but this drama is set in modern times!

Both of them are probably the best action-thriller-zombie Korean projects, and definitely among the best internationally! Both stories are more or less predictable and not too frightening or gory, but they were intense and suspenseful.
The acting and characters were great, the music well-fitted, the directing and cinematography superb.

I haven't seen Rampant yet, but they are both historicals and they both have zombies and the main leads are princes ;)

Both dramas are about a normal world suddenly being swept with a virus that turns humans into monsters. Packed with suspense and horror, if you liked one you'd like the other.

Both are set in a fantasy world where the zombie apocalypse is eminent. Both dramas starts by showing how the outbreak supposedly started and how the people around them adapt to the situation. The origin of the pathogen is different but it still has the same effect. Not your typical zombie shows.

Both are korean dramas are about zombi. In both dramas they are associated with, a curse and in both dramas people try to use them for their gain.

While different in tone (one is more comedic, the other serious), both are about a group of people dealing with a zombie apocalypse.

You can't watch one without the other, and you've got to watch the first season to make sense of the sequel.

And obviously if you enjoyed the first season, you would expect a closure in the second season.

Expect more of the same, with blood and guts galore.

Retaining the cast not only maintains the production standards but also preserves the continuity of the plot.

Kingdom is historical drama but there is zombies outbreak and situation is really dramatic. Crown prince is risking his life to try to save his Kingdom. You will love him as much as sergeant Lee from DAS.

Both series take place in Joseon and deal with the royal family and dark supernatural elements that are used for political purposes.

Historical apocalyptic settings - zombies/virus infected population - survival - thriller ! All these things are in common

Very different plot, tone, and setting but both are Korean dramas featuring zombies.
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Both have honorable, kickass protagonists fighting for their idea of a better world. Both have moody settings, a lot of action and suspense, and plenty of plot twists and political schemes.

Both are zombie dramas with ongoing storylines (multiple seasons)

Kingdom is better in every way, but kimi to sekai is still pretty good if you want something like it.

If you like the supernatural like Mon Mon Mon Monsters you will like kingdom they have zombies. It is action-packed and has a good story.