netmaze (https://aur.archlinux.org/packages.php?ID=1842) - Very old (1996) unfinished multiplayer game. 2 votes, no maintainer, PKGBUILD not updated since 2005. fxsudoku (https://aur.archlinux.org/packages.php?ID=Merge/4053<https://aur.archlinux.org/packages.php?ID=4053>) - Dead project, dead source link. Mirrors exist but it only has 2 votes, no maintainer and the PKGBUILD hasn't been updated since 2006.
Lastly, what is the 'policy' around old games and putting a link to the actual game data? Some people would class it as abandonware but if it is still sold then surely it isn't abandonware and is just piracy. For example hmm2 (http://aur.archlinux.org/packages.php?ID=33015), doom2 ( http://aur.archlinux.org/packages.php?ID=33036) and dune2 ( http://aur.archlinux.org/packages.php?ID=33037) all have a source link to the rar-ed game data at oldgames.ru.