Dude, you're a freaking tool.
Sticks and stones, sir: sticks and stones.
Metal Slug 6 does not end any arc. There was never any arc to begin with. It has the worst level designs, the worst level bosses, the crappiest final boss (outside of, perhaps, Metal Slug 5), and a lack of any of the original Metal Slug magic.
There most certainly is an "alien" arc in all three aforementioned titles. Starting with
Metal Slug X, Morden and his forces team up with the Mars People to defeat the Peregrine Falcon (PF) Squad, but -- amidst a sinister double-cross -- good triumphs over evil. Continuing with
Metal Slug 3, it's more of the same: only bigger, badder, and better. The Morden/Mars People alliance results in more mutants, monsters, and zombies, the treachery is on a much more epic scale, and the finale is simply spectacular. Concluding with
Metal Slug 6, the age-old allegiance seems to once again form, but is quickly disrupted by a new, more menacing force. This throws the normally predictable scenario into a wonderfully chaotic upheaval.
The level designs were gorgeous. I loved the first level: all that fiery golden wheat gleaming in the distance really set an unusually fierce tone. The downhill, run-a-muck train battle in Mission 2 was fantastic. I enjoyed the rocket that shot out, flew up, and crashed back down before finally detonating. The final boss was amazing. It fit the whole "alien" motif perfectly and -- depending on whether or not you rode the Rootmars in Mission 4 -- there were even alternate endings.
Metal Slug 6 easily has almost, if not every bit, as much magic as its predecessors.
Metal Slug 3 was the last really original Metal Slug, as 95% of the people here will agree. Metal Slug is the best: 'nuff said. Who cares about the difficulty level. It's all about the magic of the Neo•Geo and 16-bit in the mid '90s.
I'm not going to argue against the quality of
Metal Slug or
Metal Slug 3; they're both great, quality titles. However, I will argue that
Metal Slug 6 stands on equal footing with either. That's all I'm sayin'.
Keep your fingers crossed, maybe that'll drain the blood back to your brain.
Are you truly unable to express your opinions without repeatedly demeaning and demoralizing those with ideas contrary to your own? This not only stains and sullies your own arguments, but also diminishes and weakens your overall character. Learn to help yourself by helping others.
P.S. You do realize Battlesmurf's name is "Grant" and not "Jose," right?
That's the name I received from the PayPal receipt, so that's the name I credited. He's a great guy. Buy his stuff!