SeaDragons.io is an addicting dragon game. Play it on this page, for free. The game uses HTML5 to run fast in modern browsers. One of the many advantages about playing SeaDragons.io here is that it is available in full-screen mode. Night Steed Games developed SeaDragons.io. It has received 130,413 plays and has been rated 8.9 / 10 by 1,006 people. Did you like playing this .io game? Then take a look at our other dragon or Idle Raiders: Second Run and Dreamfields.