Many of us collaborate in Slack all day. And we all work with documents stored in the cloud — at Box, Dropbox, Google Drive, and others. Here’s how to bring them together for greater efficiency.

The eastern box turtle FILE - A male Eastern Box Turtle moves across a path at Wildwood Lake Sanctuary in Harrisburg, Pa., May 2, 2009. Carolyn Kaster / AP Rockalina is an eastern box turtle.

In order to play the game, all you need is to open doom.pdf and follow the instructions. You can either click on the control layout on screen, or type inside a box to mimick the keyboard controls.