These are some in-game UI concepts I worked on, which were a lot of fun. They're relatively low-tech computer readouts projected onto the interior of curved helmets. The player's arm also shows a placeholder diegetic UI system for displaying armor and health stats.
The assets, graphics, and presentation shown here were produced for very early exploratory stages of the game, and do not represent the final product. Steam Marines 3 is still in development. http://steammarines3.com/