Shadow the Hedgehog: Story Cycle 4: Part 7: Black Comet (Dark Mission)
At this point, Shadow has gained 5 of the 7 Chaos Emeralds. He needed two more to find out who he really is, and also figure out what Black Doom's "Day of Reckoning" is...
Then suddenly, Black Doom called out to Shadow. He needed his assistance to clear out an invasion that has occur at the Black Arms' home base...
The Black Comet, itself!
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I gotta say, playing this version of the Black Comet setting AFTER going through the Final Haunt take on it gave me quite the whiplash.
The music is more sinister, there's more than one type of enemy to fight, and worse of all, the entire level is flooded with a lethal poison that you'll have to constantly surf over with Flying Saucers, making the whole level feel slower-paced yet easier to screw up in compared to Final Haunt.
Here are its only two missions:
Dark Mission: Help Black Doom destroy all 50 GUN robots found throughout the Black Comet.
Hero Mission: Help Knuckles plunge deep through the Black Comet and reach the 6th Chaos Emerald at a Goal Ring.
I took on the Dark Mission this time. Every GUN enemy here is a robot, besides I guess the Bigfoot enemies, which also have the strongest weapons you can get from GUN: The Gatling Gun!
Now to see what happens right after you do this mission... and to be honest, it's basically EXACTLY what happens when you beat Final Haunt's Dark Mission.