I worked on GR: BREAKPOINT as a Mission Designer. My tasks were to come up with interesting ways of delivering gameplay based on writing prompts given by writers and narrative designers.
I was responsible for full gameplay logic implementation of these missions, from inception to completion, as well as communication with the level designers whose region(s) the missions would take place in.
On this page I've linked a few of the missions I authored for the game:
Video walkthroughs courtesy of OrcCorp, Gamerpillar, and h3llshedevil, respectively.