The "hacking" itself is fun for a while, but the game overstays its welcome. There is too little variety and the small flaws become more and more annoying as the game goes on. The controls are jarring as you miss features like copy and paste and HUD scaling (this makes the game unplayable at UHR resolution). There are also a lot of small bugs in the game: - Autocomplete for the last command is broken sometimes. - The mouse pointer disappears at times. You can fix this by changing the "hide mouse pointer when typing" option in control panel -> mouse, but it is super annoying. - Sometimes correct passwords aren't accepted on the first try. - Sometimes a hacked password isn't stored after disconnecting. All in all, I recommend picking this up on sale.
A short seven level prequel DLC with a new protagonist and slightly different gameplay. If you like the main game, you'll like this as well. Overall, I think Project_Hel is a bit easier than the main game, but still very challenging. The bosses are a bit hard to understand at times: I needed to check how I was supposed to beat them. Also, I wish that you could save your game within the level. Other than that, everything else is great.