Mbah A Moute has a +57 game.
Highest +/- in 20 years, including the playoffs.
Nuggets vs. Rockets - Box Score - November 22, 2017 - ESPN
This is a good post for Popcorn Machine.
PopcornMachine's GameFlows - Denver Nuggets @ Houston Rockets - Nov 22, 2017
First stint: +18
Second Stint: +13
Third Stint: +2
Forth Stint: +11
Fifth Stint: +13
I think this was the closest I've ever seen to everyone shooting < .500.
Only one person messed it up, and by only 1 make too.
Warriors vs. Jazz - Box Score - January 30, 2018 - ESPN
Great game, but damnit, Mitchell! Only player to not shoot 50% or above and he was 8-17! In a 30 point win, you could have passed the ball instead of missing one more shot!!!