You’ll likely need an X11 environment so play this so you probably need to follow these instructions ([Testing] X11(simple desktop) + Chromium(web browser) in a simple installer for Stretch) then you should be able to follow these instructions;
# Install the source repository
echo 'deb https://crawl.develz.org/debian crawl 0.22' | sudo tee -a /etc/apt/sources.list
# Install the DCSS signing key
wget https://crawl.develz.org/debian/pubkey -O - | sudo apt-key add -
# update your package list
sudo apt-get update
# install console version
sudo apt-get install crawl
# install tiles version
sudo apt-get install crawl-tiles
Doing this though is very much at your own risk so make sure you backup the system first.