Use computers (via GUIs or the command line), unlock doors, crawl through vents, fight enemies head on or find other ways to neutralize or avoid them...

High Entropy: Challenges is a free, action-adventure FPS (inspired by some of my favorite immersive sims) consisting of a beginning, 15 levels, a default ending and a special ending if you finish with a 100% score in all levels.

more info: download | website | twitter