Training games!

What games do you know of that are climbing specific?
For 1 climber and no one around?
What games that need/involve 2 or more people?
Any games that can be played with 1 climber and 1 non-climber?

Example: my friends and I play 'plus one' where someone picks a start then makes 1 move. The next player starts the same, makes the same move then adds a move. The next player starts the same and goes through the identical routine/route the others have. If someone can't make a move they get 3 tries then they're out. Move onto next start, repeat...
We've added the need to clip and extend an alpine draw to show control and the 'plus one' move and other fun variations.

Example 2: the stick game. One climbs and one holds a stick on the ground and points to the next move. The climber then has to make an 'in the moment' decision/move because they were unable to know where their next hold will be.

What do you know?