Whether you miss the good old days of Telnet or you want to know what hacking was like when security was nothing but an afterthought, Telehack is the game for you. The text-based hacking game is a simulation of a stylized combination of ARPANET and Usenet, circa 1985 to 1990, with a full multi-user universe and player interactions, including 26,600 hosts.
While you could use telnet telehack.com to telnet directly into the game, it's not the best option as far as security goes; leaving Telnet enabled on a Windows machine can leave you quite vulnerable. Instead, I recommend connecting via SSH or merely using the telehack.com website. SSH is the safer of the two as you'll be using an encrypted tunnel. 153554b96e