This game shows potential of what could have been!!!
Graphics: uses source engine, same graphics engine half life 2. Great environmental textures, and awesome physics. Character animations are nice.
gameplay: Gameplay is good, but the weapons dont feel like they carry the punch they should. Nothing new but still provides good solid fun. The leaning feature is good, lets you peak around corners and take a head shot.
cons: too short, dynamic difficulty system doesnt work well - game becomes very difficult, story very standard. Game leaves you feeling like there should have been more.
Overall: The game is good fun, standard story and its perfect for the weekend, so you'll finish it quickly. Just dont expect too much - its ja decent shoot em up with the half life 2 engine throne into the mix. Could have been a great series though, if some more work went into its longevity...