Its progression isn't extensive nor complex, plot is linear, in-game decisions don't have permanent implications moving forward, graphics are outdated, in-game obstacles and enemies do not exhibit variations in behavior. However, I absolutely love this game; for me the replay value has been high and I use it to challenge myself and see if I get fall into a flow. The gameplay mechanics are simple but each replay can be different, as efficiency can be strained at the top difficulty. Not challenging as an FPS, but as a mental test of efficiency vs. tactical sustainability it can be played well.
