The announcement of Doom: Eternal at E3 2018 got a lot of trigger fingers twitching. But what is it, when is it coming, and how will it expand on the well-loved franchise?Few franchises embody the FPS genre quite like Doom. Packed to the seams with blood, hellfire, shotguns, and even more blood, id Software’s ultra-violent shooter has earned legions of fans since its first game in 1993: pitching a nameless marine against hordes of demons unleashed from hell.Now, two years after a 2016 reboot brought the franchise successfully to modern consoles, we have word of a direct sequel: Doom Eternal.[Update: Bethesda has announced that its E3 2019 press conference will take place on Sunday 9 June, with Doom Eternal its showcase centerpiece. Read on for more info.]Doom Eternal announced at E3The sequel is aiming to go bigger and better than ever before, introducing an enhanced Doom slayer and a host of new demons – and this time the invasion has spread further than Mars.Cut to the chaseWhat is it? A fast-paced, ultra-violent shooter where you beat and shoot demons to a pulp, and the sequel to 2016’s DoomWhat can I play it on? PC, Xbox One, PS4 and Nintendo SwitchWhen…