Hishouzame's own hori panning is indeed relatively harmless, I would say due to its pitch-perfect player speed VS enemy shot speed, and its tight sprite-to-screen dimensions. Super cleanly-readable game, and just a preternaturally well-done STG on the whole. It's sort of the Kunio-kun of STGs, imo... not technically the first, and not as flashy as later efforts, but it schools a whole slew of younger games on those fundamentals, and that same stripped-down nature makes it a snap to pick up and get lost in.
It's really the later stuff like Same3 1P ver, Raiden and Trigon that get my back up, with the ship/bullet balancing creating some lethal patches of offscreen space. I totally forgot to mention Video System and Psikyo here, games with truly hellacious bullet speed that I nonetheless find comfier than the aforementioned (granted they tend to have faster ships, smaller hitboxes, and kinder bombs, and are ultimately balls-hard as all hell anyway

).
Steven wrote:
Hishouzame... I guess the best way to describe it is as having a comfortable and enjoyable tension.
Yeah, precisely. Where Fighting Hawk unfortunately can be a little sleepy by AC standards, and later Toaplan/esques can be just harrowing, Hishou's got an excellent cruising speed to it.
Ah yes, I remember Koshiro mentioning Druaga... that's exactly the sort of thing that'll draw me to games like that, which I've very little personal attachment or history with. Xevious is another, when there's so many legendary figures swearing by a game it's impossible not to want to check it out firsthand.
There's so much good stuff on ACA now. The one caveat of their being digital-only aside, something I don't really sweat with modern conosoles (I kill for CIB 80s through 2000s stuff, but stopped caring as much once it was all discs and day 1 patches), I would say it's the single-best source of arcade gaming on console we've ever had. Hamster have all but mastered a balance of essentials, obscurities, volume, and no-frills but disciplined, low-lag emulation. I hope they stick around a good few years yet, it'd be amazing to see them tackle these publishers' mid-90s hardware at the same standard. The past gen has really worked out brilliantly, with M2 as the unrivalled kings of super-deluxe boutique releases, and Hamster covering myriad smaller but no less essential titles.
I would've bought TD2 blind as a bat (a practice ACA Athena has otherwise disabused me of, I find it mortifyingly bad

), just on the sheer number of good peeps that swear by it, but I too hit TEH ROMZ a week before release because I couldn't wait.

The jewel of the whole ACA shooter lineup imo, and there are some other real killers in there too.
(slight tangent) Haunted Castle is legitimately a very weak game imo, though not the total mess it's popularly known as (it's a mess, just not a total one >_>) You may be aware, but if not, it had a memorably tragic dev cycle. It was actually only given the then-new Dracula name as a last resort, being a random horror sidescroller falling behind in development. They roped in devs from other projects to help out, but they left before playtesting, and uh...
YEAH ROCKDUDE, THAT MAKES SENSE
DR. WANKENSTEIN PLS 
One thing to be said though, it pioneered a surprising amount of recurring enemies, setpieces, BGMs, and general aesthetics (reaching as far as M2's Dracula Rebirth for Wii), making it worth at least one playthrough for series fans. I really like its unique take on the traditional end-stage HP restore, too. Here, each hitpoint costs you one ammo... so going unscathed is richly rewarded with much more ammo for those chokepoints. (unfortunately, the only subweapon worth using is the Stopwatch - still, nice in theory >_>)
Anyway, all this to say, if you've not already I would go for
Argus no Senshi aka Rygar first (JP ACA release has both; they're only subtly different, but always nice to see). Very STGesque balance of razor-sharp handling and dominating firepower with shock 1HKO deaths. The i-framed chainable head-stomping is inimitably joyful - for purveyors of such unremittingly hardcore action, Tecmo's AC division had a lovably playful side.

Also Saigo no Nindou, another decidedly STG-influenced classic from IREM (
obligatory caveat - will see you through its infamous 11th-hour kusomemoriser, which would kill lesser games dead, but merely knocks this wicked gem of tactical/improv intensity from 11/10 down to plain ol' 10

).
I happily picked up ACA Akumajou Dracula (w/ the brutally unfair Haunted Castle rev bundled) to replace Hamster's own rather jankier PS2 version, but I'm a Dracula weirdo like that.

As far as arcade Dracula goes, VS Castlevania (also on ACA) totally outclasses it. If you've played the NES/FC ones, you've also played VSC, barring its tighter damage+time allowances... but as a "master course" affair, it's an excellent way to definitively bury the fiend

(and then move onto the real oldschool CV Nightmare: Castlevania III (NES) Loop 2 Trevor-only.
