Favorite tracks from the franchise's OSTs?

there's just something i love about "Brane Scan" and "CP Violation", in my opinion those are half-life 2's greatest songs. "Military Precision" from half-life 1 is great, and episode 2's "Sector Sweep" totally bangs. episode 2 also has a track that didn't make it onto streaming services -- "Crawl Yard". justice for crawl yard (︶︹︺)