D/Generation HD is a remake of a 1991 isometric adventure game. You play as a courier that is attempting to deliver a package, you land on the top of a research building and find creatures running around and automated security systems are active, this includes tripwires, mines, or security to keep things from getting into a room. You have a weapon that can be used to active switches from a distance or to kill enemies, it will also bounce off of walls. There are rooms with survivors that you can help lead to safety if you want, and you can talk to them, most won't have anything useful to say they are just there to rescue, kill, or ignore. There is a type of enemy that will disguise themselves as survivors. The remake has wall at a realistic height which can hide both hazards and switches from your view, though the game does put yellow arrows on top of walls that shows you where switches are, when you move to a position where you would be blocked by the wall it will become transparent. Movement is also not handled very smoothly. The graphics are improved but are very impressive, with the enemies just not being very interesting to look at. If you were a fan of the original and want to play an HD version or are interested in an isometric game with some puzzles and arcade like elements then this might interest you, otherwise it is a high price to pay for a game that just isn't that interesting.