Hey, I found I some stuff lacking in your lists, so I thought I'd register and post some music! Some of these may be obscure but still goodies.
Donkey Kong Country: Tropical Freeze (WiiU)
I know there are already some tracks for this on the list, but honestly, the OST is legendary.
Seashore War
Wing Ding
Scorch 'n' Torch
Gunlord (Neo Geo)
I hope you like music from new games made on a dead system. These tracks sound like they belong in a shmup. Rafael Dyll usually composes for shmups anyway.
Main Title
Steel and Thunder
Lost Vikings (SNES)
Remember when Blizzard used to be good? Here's a small taste.
The Croutonian Ship
Factory Beat
Metropolis Street Racer (Dreamcast)
Remember the great music for Sonic R? Well, this is from the same composer, Richard Jacques.
It Doesn't Really Matter
Outside In
Neorude 2 (PS1)
This is an extremely obscure JRPG. So obscure that there's only one track on YouTube, but it sounds pretty epic.
Last Battle
No Heroes Allowed! (PSP)
If this doesn't put a smile on your face, then... really? Go watch the credits again!
Credits
The Beginning Is the Usual Dungeon
Theme of Protecting the Demon Lord:3D
Oceanhorn (iOS)
This is the game that wanted to try really hard to be Wind Waker, but fell a bit short because it was made on the goddamn iOS.
Sky Island (composed by Kalle Ylitalo, first-time game composer)
Mesmeroth (composed by Kenji Ito of SaGa fame)
Final Boss (composed by Nobuo Uematsu of FF fame)
Pictionary (NES)
Tim Follin. 'Nuff said.
Title
Ragnarok Online 2 (PC)
The game was shit, no doubt about it, but the OST was composed by Yoko Kanno, which shouldn't be ignored.
Sailing
Hodo
Runner2 (PC)
This game about running has a pretty cool OST.
Runner2 Theme
Superfunk
Cloud Titans
Sparkster (SNES)
Here's an old-school action platformer and sequel to Rocket Knight Adventures. There's a Genesis version, but I like this one better.
Lakeside
Super Robin Hood (NES)
Yes, it's called
Super Robin Hood on the NES. Strange, I know.
Title
Turok 2: Seeds of Evil (Game Boy)
Glorious chiptunes.
Scroll Stage