After completing the HL2 line (as it exists so far) I find myself wanting to play some more FPS. What I'd like is something similar to what the Rainbow Six games had where after you played a map in regular mode you could play it in "Terrorist Hunt" mode where the objectives were removed and the map was filled with terrorists ready for you to shoot. Was great when I only had a little bit of time and/or didn't want to sit through cut scenes/exposition you tend to get in story modes.
Can anyone make some recommendations?