Trial and error gameplay; seeing your head fly off when you die; falling through platforms that were once solid in a previous life; the game telling you Gordon has no more grenades when he has one in his hand; AI blocking doors, getting stuck behind walls, and missing targets to hit you when you are on their side; scripted scenes that occour when you are out of range to see them; a confusing final boss that will make you question if you are actually damaging him; repetitive enemies; lackluster music; malicious ladder physics; questionable physics in general; topped with a minimalstic and anticlimatic credits seqence; these are the reasons why I call "Half-Life" "Half-Finished".

The survivalist vibe is implemented well, but if you want that, I would reccommend just about any other action game ever, including Half-Life 2.