I know you are all into the rules and lawyering this this time of year but I am now a grandpa and need this game describe in simplest terms so I can tell great grandpa what is happening. Try and keep it to 3 sentences. After that our minds start to wander.
Teams earn points based on the amount of time the game elements are tipped toward their color. There are special modifiers teams can ‘buy’ with crates. During the end game, teams can earn more points by “climbing” the center structure.
I left out some interesting details, but kept it short 
With all due respects to everyone, here is short description on page 2:
https://www.firstinspires.org/sites/default/files/uploads/resource_library/frc/game-and-season-info/competition-manual/2018/first-spectatorflyer18-frc-ltr-dec-form.pdf
Three robots on a team, blue or red. Use yellow blocks to tip the scales in your favor, and score points for each second you control the scales. Climb the middle scale at the end.
Use cubes to tip seesaws in your team’s favor. The longer the seesaw is tipped in your direction, the more points you score. Bonus points if you are hanging from a bar when the game ends*.
*Grandpa likely doesn’t need to know the specifics of all the climbing rules.
I really like the first two sentences, but maybe a bit more on the third:
Bonus points for points robot actions before drivers take control, use of cubes as “power ups”, and robots hanging from a bar when the game ends.
If we take the manual and remove all the punctuation, won’t it become one very very long run on sentence? It would be eating a bowl of spaghetti and discovering it was all one long piece like a ball of yarn when you tried to suck it in.
My Description:
Some young whippersnappers are going to try to steal milk crates and go play with them on the teeter-totters. Who ever owns the teeter-totters longer wins.