Well, your option is to write it in Perl. Without more information it is hard to be more specific than that.

If it is a text-based game it may be perfectly practical to implement it in Perl without additional modules.

If the game involves graphics, it is likely to be quite hard to implement it without additional modules - the Comprehensive Perl Archive Network ("CPAN") is a huge resource of useful libraries in all sorts of domains. And since perl is not running in the browser, you don't have the DOM and its capabilities available. However there is nothing magical about what is available on CPAN - in principle (given enough time) you could reimplement any functionality you need, it's just that most people would consider it wasted effort to replicate what's already been made available by others.

Perhaps you could tell us more about what type of game it is, and what you hope to achieve by rewriting it in Perl, so we can provide a more useful response.