General :: Processing Script That Find Latest Version Of Each File

I want to write a script. I have the basic form working... but I would like to add some advanced features. I have a list of .zip files that have a version number in the filename (i.e. sudoku-134.zip, sudoku-176.zip, sudoku-203.zip, etc). I would like to have a script that will find the latest version of each game, and unzip it. I want the next to latest version left untouched. But anything older, I would like the unzipped folder deleted (But leave the .zip file)

Here's what I have so far:
Code:
#!/bin/bash
cd /var/www/vhosts/server.com/httpsdocs/games/$1
for file in `ls *.zip`; do
if [ -d ${file%.*} ]; then
echo
else
mkdir ${file%.*}
cd ${file%.*}
unzip ../$file > /dev/null
cd ..
echo 'date' $file >> /var/www/vhosts/games4roku.com/private/$1.log
fi
done
I can call the script with "game-unzip public" to unzip all the public games.

Here's my files:
Code:
sudoku-134.zip
sudoku-134/
sudoku-176.zip
sudoku-176/
When I add the latest version, sudoku-203.zip, I want it to unzip it to ./sudoku-203/ and rm -rf sudoku-134