I liked blue shift because it has the ending I wanted in HL ![]()
In HL I got obsessed with making it to the surface and escape, but it never really hapened, or not the way I tought it be.
Further it just depends on the quality, and sometimes you just need the expansion because it brings new maps and stuff for online games that you can;t find games without having it (Total Annihilation:CC, mmorpg,...)