A: Almost every single game in Pyramid Arcade can be played with 2 players. Only a couple are probably still better with more (or less!), and many are 2-player only.

1-2 or more:
Color Wheel is perhaps best viewed as a solitaire game, but it’s fun to play cooperatively with two, or you can play it competitively by seeing who can solve it in the fewest moves.

2 player only:
Black Ice
Hijinks
Homeworlds
Lunar Invaders
Martian Chess
Petal Battle

2 or more, absolutely fine with 2
IceDice
Launchpad 23
Petri Dish
Pharaoh
Powerhouse
Treehouse
Twin Win
Verticality
Volcano (actually better w/ 2 than more)
Zark City

2 or more, but better with more
Give or Take
IceTowers
Looney Ludo
World War 5

more than 2
Pyramid-sham-bo (listed in the book as ok for 2, but that’s a typo. Actually really the more the merrier.)