It's not a game you can play, and is of no interest to the casual browser.
It was broken for years and no-one even noticed.
Ref: http://lists.gnu.org/archive/html/emacs-devel/2014-06/msg00288.html
+2014-10-06 Glenn Morris <rgm@gnu.org>
+
+ * menu-bar.el (menu-bar-games-menu): Remove landmark.
+ It has zero relationship to a game.
+
2014-10-06 Leo Liu <sdl.web@gmail.com>
* imenu.el (imenu): Re-write for clarity.
(bindings--define-key menu [life]
'(menu-item "Life" life
:help "Watch how John Conway's cellular automaton evolves"))
- (bindings--define-key menu [land]
- '(menu-item "Landmark" landmark
- :help "Watch a neural-network robot learn landmarks"))
(bindings--define-key menu [hanoi]
'(menu-item "Towers of Hanoi" hanoi
:help "Watch Towers-of-Hanoi puzzle solved by Emacs"))