On the contrary: Fans have ported the action horror game to just about platform imaginable ... there are likely dozens of ways to access the original Doom online. What makes this version unique ...

A Doom CAPTCHA swaps puzzles for first-person blasting in the iconic game, allowing players to kill demons to unlock web access.

It doesn't take an expert to see that this game is very much in the same vein as the original Doom, with its unique art style and brutal combat making it a perfect pick for fans of this genre ...

one that invites users to play the classic single-player game DOOM and kill at least three monsters. You can check it out here. It’s not a wholly original idea (the DOOM as CAPTCHA part).