Do you like getting your butt kicked unmercifully?
If so, Gradius V is the game for you!
Even harder than the criminally tough Gradius 3, and forget 2 player mode, that just gets wacky.
Not Ikaruga wacky, but like... "Whoa, WTF are you doing!?" wacky!
And it feels pretty Life Force-y. Maybe it's just the calling the Options "Multiples" and all the hearts of Zelos that does it tho...
"Hey, you got Gradius in my Life Force!"
And yes, I know they're the same series.

In summary... Buy it, Play it, Love it.
But it'll beat you no matter what!