Risk of Rain- Tropic of Cancer vs
Lufia: Curse of the Sinistrals- Battle 2: Tropic of Cancer is good, but
that horn intro.
Xenosaga Der Wille Zur Macht – Margulis vs Okami- Reset ~Ending Theme~: Supremely fitting villain noise.
Dark Souls 3- Dragonslayer Armor vs Super Metroid- Lower Brinstar: Mecha Ornstein has one of the better boss themes (and boss battles) in the game. DS3's OST too often hits the Epic Chant button too early, but sometimes it works. Also 2:59 tends to hit right when you're sure you've figured out the fight and are about to win (even if it's not true, you probably feel that way). I still might've voted for Lower Norfair here, though.
Shin Megami Tensei: Nocturne- The Tokyo Conception vs
Speed of Doom (Custom Doom 2 WAD)- Getaway: This is tough. Doomguy noise has been pretty good so far, but that's a nice buildup there. I think I'd've voted the other way if Tokyo Conception was a bit longer.
Mega Man X- Storm Eagle vs
Final Fantasy X- Someday the Dream Will End: Tough draw, Storm Eagle has some nice fake guitar sounds.
Bravely Default- Wicked Flight vs
Portal 2- Bombs for Throwing at You: Something I would've nommed if I'd had more room vs. actual own nom. Easy choice but no hard feelings either way.
GENETOS- Origin vs
Final Fantasy IX- Dark Messenger: A rare memorable track from the FFIX OST. GENETOS had cool moments but I dunno if I dig it as a whole.
Persona 5- Wake Up, Get Up, Get Out There vs
Undertale- Spear of Justice: Link for the first is dead, but fortunately I am capable of typing words into a YouTube search. It's nice, but vs. own nom, so.
Are all portal song titles silly regardless of song?
Pretty much. The OST is a study in outstanding song titles. MACHIAVELLIAN BACH. (I seriously considered nomming this just for the title.)