- not immersive or scary, because the texture res and polygon counts are low. For example head-crabs should be creepy and terrifying but they just look goofy and annoying.
I just completed (again, for achievements) Half-Life 2 and Half-Life 2: Update. The latter enhances lightning and has a commentary mode. One of the commentaries is that monsters are by design not meant to be scary, but rather gross and ugly.