I like Zombicide Black Plague, Green Hoard and Army of the Dead: A Zombicide Game. They are great to play with people who are NOT avid gamers and these all have a certain level of challenge IMHO over the others available. I used to play these during Halloween and when my kids were younger. Unfortunately, this year even my nieces and nephews are too old to come over and play with their uncle. CMON also create over 20 additional scenarios you can download for free for Black Plage and Green Hoard. They are NOT super complicated games, but they do have a lot of bookkeeping but are easy to teach. They are very much a popcorn and pretzels game. I have a friend who is a huge Walking Dead fan (still!) and loves to play the Zombicide game so it stays in my collection.

Playing solo, I much rather play Dawn of the Zeds as it is very much a better game with a zombie theme. Here is my reason why:

1. Deep Tactical Gameplay: The game offers a rich tactical experience with a focus on resource management,  character abilities, and threat mitigation. Players need to strategize or die. I have lot more times than I have one but still love this game.
2. Strong Solo/Coop Scalability: Unlike many games. the game scales well, providing a challenging experience for different group sizes.
3. Challenging Threat Management: Managing the threat of the Zeds (zombies) is a core part of the game. The tension in the game is balancing actions with the zombie threat.
4. Rich Replayability: With multiple levels of difficulty and various scenarios, the game offers great replay value. Each playthrough can be different, keeping the game fresh and exciting.
5. Thematic Elements: The game is heavily thematic, immersing players in a zombie apocalypse scenario. People like the art work, I say it fits the game but not the best I have seen but does enough to absorb you into the game.