Some of the other reviews have mentioned that the game is short, and that the puzzles might feel lacking. They aren't wrong. There are only a few puzzles that have more than two layers to unravel, and the entire third act is "contextual" in terms of problem solving. You interact with the correct location, and if you have what you need in inventory, it works in all but one case. The climax is more of a cutscene than a problem, as well. I like the game, and the level of effort put into evoking nostalgia is admirable. The voice acting is also a worthwhile addition. Overall, the frustrating streamlinedness of the final act keep Guard Duty from getting five stars, but it's absolutely worth playing if you don't mind the whole thing basically being in easy mode.