1 – Zombies is a physical game in which players are split into two groups, zombies and survivors, the zombies goal is to infect all of the survivors without getting killed, and the survivors goal is to “kill” all the zombies without getting infected.
2 – House of Horror is a role-playing board game where players are separated and all attempting to escape from a Haunted House by first reuniting with other players and then using clues to find the correct way out.
3 – Survival of the fittest is a card game where players attempt to survive the end of the world by collecting various supplies, weapon, and safety cards and using them to level up their “survival skills”.
4 – Sink or Swim is a stacking game where players try to keep their game piece above the “water level” by using their own/stealing other/trading blocks.
5 – Battle Board is a board game where each player takes on the persona of a warrior and players them must make their way around the board, leveling up points and battling every time two players “meet” on the board.
Survival of the Fittest sounds like it’s just the collecting mechanic. Maybe you could add a trade or steal mechanic for items? Or perhaps there is a time/hand/round limit? Either way, I think one of the safety cards should be something about farming, because people always forget about agricultural advantages when they stockpile guns for their doomsday bunkers.