Dark Signs is a hacking game that simulates a network environment where the
player must hack different servers in order to complete different assignments,
such as retrieving, decrypting and manipulating data.

The game interface is largely text-based, and the player must use the game’s
scripting language D-SCRIPT to run commands or, in some cases, to write longer
scripts.

The core gameplay consist in scanning the simulated network server ports for
vulnerabilities and exploiting them, using various simulated online tools and
visiting various newsgroups to read about vulnerabilities in the simulated
server software.

As the game progresses, the hacking tasks become more difficult, and the
player will have to combine bits of knowledge learned in earlier missions in
order to complete the later missions.

Dark Signs