For Xbox One, press the D-Pad (right) on the. For Pocket Edition (PE), tap on the chat button at the top of the screen. For Java Edition (PC/Mac), press the T key to open the chat window. The game control to open the chat window depends on the version of Minecraft. The easiest way to run a command in Minecraft is within the chat window. Doom 3 focuses on slow methodical gameplay, as opposed to the 'run and gun' feel of its predecessors. Set on November 15 in the UAC research center on Mars, it is a re-imagining of the original Doom, with a completely new game engine and graphics. Doom 3 is a science fiction horror first-person shooter computer game developed by id Software and originally published by Activision.