Saw the first two board games get added and got inspired to make a list of cool games to have:
Hangman
Tic-Tac-Toe
Checkers
Four in a Row
Go
Shogi
Chinese Checkers
Dungeons and Dragons
GURPS
Secret Hitler
One Night Ultimate Werewolf
Uno
52 deck of cards
Cards Against Humanity
Exploding Kittens