As an action shooter, this game is very nontraditional. It removes the ordinary shooter elements such as health, ammunition and others. If you are wondering how you keep track of your condition – it's visually obvious, the screen turns red and Heyden grabs his chest in pain when things get bad.
There are very creative ideas in Dark Sector which contribute to the great gameplay. For example, weapons you pick up from dead soldiers have a device that detects the Technocyte virus and it will soon explode in your hands, so you have a limited amount of time to find another weaopn. You also have your personal weapons that you carry in your backpack, for which you can buy upgrades or new weapons from special shops normally found under a sewer shaft.

click to enlarge
Regarding the super powers, I already mentioned the shuriken which hits and cuts with great accuracy. At the beginning it's a bit hard to control it, but soon you will get used to it and it will become your favorite weapon – which gamer doesn't love ninja-like elements? The shuriken can also undergo changes such as becoming cold or
electricity and fire variants when in the related environment. These modifications are often the key to the puzzles. Now add slow-motion first person control of the shuriken's flying path – then ask why this is my and most gamers favorite weapon.
Talking about puzzles, it's actually nice to see them in a game like this. They are lots and vary from easy to very hard. The bosses are also connected to this, and each one of them has an unique way to be killed – and believe me, the solution is often nontraditional. You will have to use all of your super powers and some clever tactics I'm not going to spoil for you.