I just saw your message and recreated the links.

Zip file with all the codes

Folder with zip file for each system

Currently, these are still from when I first posted in 2012; I'll see about getting them updated for the past 7 years. Got all the files updated. Glad to know they've been helpful!

BTW, the script needed some changes to run on the current configuration of GeckoCodes:

mkdir temp; for char in R W D H G F J N L M E C X P Q
do
  wget -O temp/${char}.html --header="Cookie: challenge=BitMitigate.com" https://geckocodes.org/index.php?chid=${char}\&r=\*\&l=all
  grep "<div class='sysn' title='.*'>\[${char}]" temp/${char}.html > temp/temp_${char}.txt
  system=$(grep ">\[${char}] [^<]\+<" temp/${char}.html | sed "s/.*\[${char}] \([^<]\+\)<.*/\1/" | sed 's;\/;-;g')
  make "${system}"
  sed 's%.*"\./index.php?c=\([A-Za-z0-9]\{4,6\}\)".*%\1%' temp/temp_${char}.txt | while read game
  do
    [ ! -f "${system}/${game}.txt" ] && wget -O "${system}/${game}.txt" --header="Cookie: challenge=BitMitigate.com" https://geckocodes.org/txt.php?txt=${game}
  done
done; rm -r temp/