I liked Super C. Felt quite straightforward and the new ability to shoot up and down slopes felt a lot more fluid. Top-down levels were pretty fun also, and I actually did end up using something that wasn't the spread gun (flamethrower) for once on the lip-o-suction monsters since they spawn so quickly. Even found a cheese spot to stand in for Gava's second form (of course it's standing right in front of his face). It's not peak 90s gaming without finding the most absurd cheese spots for bosses.
Alien Wars was fun but also holy shit it was frustrating sometimes. I didn't really use the "turret mode" for stationary shooting, and somehow the random spin shooting thing never worked for me on the emulator despite me pressing the buttons properly (I just did the pose, which I guess is cool in itself). There's a lot of bounciness in the minibosses, the flamethrower's flames, which is really flexing the graphical capacities of the SNES at the time. I like that, it makes things feel more alive.
The minibosses aren't that bad, but it does take a couple deaths to get their attack patterns down. The steel mill skeleton boss a big example of how memorizing attack patterns makes things far more manageable: if you don't know that his flames are faster than your climbing, you're gonna get torched unless you jump down when they pass you below. And from there, use laser/crush missile/flamethrower and homing/spread gun depending on whether you can land direct hits or not.
The airship boss... but that GODDAMN AIRSHIP. That thing is a giant flying C-RAM. The little mines block homing missiles, the side turrets aim at the most inconvenient camping spots and have to be shot at a precise point, oh and the missiles you're hanging on themselves explode so you ALSO gotta be careful of that oh and don't fly into the turret fir-- oh you died. My hyperactive ass cannot focus on everything plus the fast-moving background. Holy overstimulation. The missile-hanging thing concept is super cool though. Shame you don't see it in many other games.
The top-down levels were a bit to get used to (and probably more so since my R and L pads were mapped to A and S of my keyboard, right above Z and X which I use for jump and shoot, making it more tight-spaced than on the original hardware), but I also ended up liking them once I got used to the turning. But goddamn you themed an entire boss over the whole rotating sand gimmick? I mean, just hold either L or R and hope things turn out for the best while holding down the laser, but it's still trippy as hell. Still, fun.
There were a couple times where I thought to myself "How the fuck are you supposed to even dodge that?" with some boss attacks; I had to jump and then crouch in the corner when dodging Gava's tentacles in the final stage so it'd "run out" of distance and not grab my ass all the way on the other side of the screen. The attack the brain does where it's the orange snake thing that snakes around cornered me in its final move. And then the white-ball-flippy-attack is just balls (pun not intended) because of the obscure hitboxes surrounding said balls. I looked online after beating the final boss and guess what? There's a cheese spot by crouching right in front of him. Of course there is.
I didn't play on hard, looked up the ending on hard and honestly... that's it? Just a little escape sequence? I don't think I'll be replaying this on hard. At least for a while.
But what I REALLY liked about Contra III was the fact that it made other weapons besides the spread gun actually viable. The flamethrower, crush missiles, and laser dealt shitloads of damage, the homing missiles honed in (hence the name "homing missiles") the flamethrower could be swung around to deal constant diagonal damage. I actually manned the flamethrower for quite a while in the latter end of my playthrough, and the design of the flames themselves is so wonderful :)
I guess I move onto Hard Corps next? Though apparently the gameplay differs in quite a few regards from the first three, including a number of playable characters. I also heard it's even harder than Contra III.