There are some plot points that are "spoiled" if you go the chronological route, but that mostly happens if you read works set prior to the events of Dead Space (the main game) before playing it, but since you have played it already I'd say you can go either way.
Order of publication is usually the way to go for most media, as that is how the creators "meant" them to be presented to you. In my opinion, either play/read/watch it all in chronological order, or by date of publication, which I've put in parentheses after each work. Gives a concrete premise to the game and watching this movie has really peaked my interest. Very pleased with this setup flick to the game Dead Space. Dead Space 2: Severed (DLC, 2011 takes place at the same time as Dead Space 2) The high levels of ultra violence and gore make this movie a joy to watch for horror movie fans.Dead Space: Extraction (game and comics, 2009).Dead Space: Downfall (film, 2008 takes place at the same time as Extraction).
It shows the events leading up to the beginning of the Dead Space game and how the Necromorph.
It was developed by Film Roman and was released on Octofor Blu-ray and DVD. The series takes place in the future, where humanity has become technologically advanced and colonized space. Dead Space: Downfall is the animated horror prequel to Dead Space, taking place during the events of Dead Space: Extraction and the Dead Space comic leading all the way up to the beginning of the first game. Here's the chronological order of events in all Dead Space media, from my memory and this timeline on the Dead Space wiki. Dead Space is a Third-Person Science Fiction Survival Horror video game series developed by Visceral Games (formerly EA Redwood Shores) and published by Electronic Arts.