https://mirrors.slackware.com/slackware/slackware64-current/...
In addition, SBo (Slackware equivalent to BSD's port system with 3rd party software) offers nbsd-games, a series of classic Unix games with a ncurses interface:
https://slackbuilds.org/repository/15.0/games/nbsdgames/
It's nice to see true classics being preserved in one of those packages.