I didnt know this.

there are hidden games in your mac!

they are accessed from the terminal.

1) dunnet.
open terminal

emacs -batch -l dunnet

its a mud. its quite strange and all I found out is that I need a key to get through a door and that there is a bear.

2) game of life
open terminal

emacs

press esc
press x
type: life
press enter

3) tetris
open terminal

emacs

press esc
press x
type: tetris
press enter

3) doctor
open terminal

emacs

press esc
press x
type: doctor
press enter

there are a load more inside emacs:

5x5
animate
blackbox
bruce
cookie1
decipher
dissociate
doctor
dunnet
fortune
gamegrid
gametree
gomoku
handwrite
hanoi
landmark
life
meese
morse
mpuz
pong
snake
solitaire
spook
studly
tetris
yow
zone