HL2 singleplayer..

[reefsurfer]

looks fucking horrible though... i usually dont bitch about graphics but that could i ayleast have something from 99-2000

[R. Tetzlaff]

First Person Shooter gameplay (in singleplayer) consists of

1. combat
2. exploration
3. puzzles

Some FPS games have character development, driving and fighting aswell..

But then it´s a hybrid game, if there is RPG style character development or driving etc integrated. Or an FPS with extra features borrowed from other genres basicly.
The 3 basic components of combat, exploration and puzzles on the other hand are the core of FPS gameplay since the early days of Doom (even Wolf3D had simple key/door puzzles and exploration). You can have a good FPS without character development and without vehicles, but you can not have a good FPS without any exploration and some kind of puzzle tasks to accomplish.