After creating a very complicated (but very cool) game called Djinn Combat (which is still in development) I wanted to create a simpler game that shared a specific aspect with Djinn Combat that I really liked: that it could be played anywhere, at anytime, and with nothing but you and another player. So I created the game I call Up-or-Down.
The concept is simple enough to learn. The first player (P1) says a number 1-100, and the next player (P2) says a different number based on what the first person said. If the P1 said an Odd number, then P2 has to say an Odd number that is Above the number that P1 said or an Even number that is Below the number that P1 said. However, if P1 said an Even number, then P2 has to say an Even number that is Above the number that P1 said or an Odd number that is Below the number that P1 said. Three other restrictions are that the number can’t be less than 1 (it can be 1 though), it can’t be more than 100 (it can be 100 though), and it can’t be the number that was last said (after all, that isn’t above or below the number that was said).
For example, if P1 said 53 (an odd number), then P2 could say something like 67 (an odd number above 53) or something like 2 (an even number below 53). However, if P1 said 8 (an even number), P2 could say an even number that is above 8, such as 100, or an odd number that is below 8, such as 7.
You can also have as many players as you want, although there are two different ways to play. In each version you have an order, such as P1 then P2 then P3 then P4 then P1 again. If P1 said 5, P2 said 7, and P3 said 8, P3 would have lost, but P4 would continue the chain with P3’s last response, meaning that he could answer 10, or 80, or 1, etc. Note: even if the person who went out said a really wrong number, like 1 million, the next player still has to say a number that is valid (between 1 and 100 and the correct even/odd-ness)
The different versions of multiplayer involve what happens after someone goes out. Version #1 is a tournament version, in which if someone says the wrong number they lose and have to stop playing until the end of that game. Whoever the last one still in wins, and he/she gets to choose the first number for the next game.
Version #2 is a training mode, in which no one goes out. If someone says the wrong number, then he/she gets to change his/her number to one that fits. This way people can more easily learn the game without having to wait until the next game every time they go out. However, you can still have a winner by keeping track of whoever the last person to make a mistake is.
Feel free to add any rules that you’d like, it’s pretty adaptable. Hopefully I’ll soon have a post on alternate ways to play to make it harder or different once you have it down. Either way, enjoy!