Simple 2500 Series Portable!! Vol. 13: The Akuma Hunters - Exorsister

The first thing you should know about this game is that it bears no relation to the early 90s series of comedy/horror/porn films starring famed comic creator Ippongi Bang. I hope you can get over your obviously grave disappointment.
It's actually got more in common with the Oneechanbara series being, as it is, developed by Tamsoft, and featuring a group of attractive women engaging in combat with horror-themed monsters. Also like the Oneechanbara series, the game has only a few maps,

each having several missions taking place in parts of it. The game has a big flaw that its more famous sister lacks though, which is that most hated bugbear of modern action games, endless grinding. While the Oneechanbara series does have experience points and levelling up, the player's progress isn't particularly impeded by their low level, Exorsister requires re-playing stages over and over to grind for the materials to sell so you can play a stronger weapon that will reduce the awful slog of the next one.
When you do manage to save up for an adequate weapon, the game is a fairly entertaining (though repetetive) beat em up. You go about the stage,

beat up monsters (who do look pretty cool, and there are a fair few varieties of them, too), and while they're unconcious on the ground, you exorcise them. Each weapon has two stats: AP (attack power) and RP (I assume this means rosary power?), their functions are fairly obvious: attack power indicates how much damage the weapon does when attacking, and RP indicates how quickly monsters can be exorcised with the weapon equipped.
Fighting tough monsters, who will have three main advantages over the player, such as lots of health, lots of.. spiritual health(?) and an entourage of goons to protect them,

is simpler than it seems at first. You just need to stay locked on to the target, and wail on them, dodging out of the way when they look like they're going to attack. When they're down, the best way to exorcise them is to charge the spell up close (which makes it charge much quicker), then run away from the crony monsters before casting it, so they don't interrupt it with their attacks. And don't bother killing the cronies until you kill the target, as they'll quickly respawn.
Anyway, although I've enjoyed this game, and spent a good few hours playing it, I can't call it a good game or really recommend it. The fact is that the grind of having to repeat stages to get equipped for the next ones is just so boring, and there are much better things to do with your time than waste it on that kind of rubbish.

Buster (X68000)

Buster is a platform game, that's clearly been heavily influenced by Arcade platformers of the late 1980s, like Wardner and Legend of Hero Tonma. In it, the player travels, in the traditional manner, from left to right, killing enemies as you go. The only part of the game that's particularly original is the sword meter, which decreases every time you make a normal attack, and replenishes gradually when you're not attacking. You do also have an alternate attack, in the form of a splatterhouse-esque sliding kick, performed by pressing the

attack button at the same time as hitting the ground after a jump or fall. The sliding kick doesn't deplete the sword meter, and in fact quickly replenishes a large portion of it.
Don't mistake unoriginality for low quality, though: Buster is an excellent game that also has great graphics and music. The controls are tight and the stages are designed with deliberate precision. Nothing in the game feels arbitrary or accidental.
There is an aspect of the game that will put many off, however: its difficulty. The stages are designed with precision, and they expect to be played with precision in return. The first stage allows the player to get acquainted with the controls and mechanics, but as soon as the first boss is defeated, the game no longer has any mercy. There are jumps which require pixel-perfect accuracy, and a little later, situations that require that accuracy in jumping, but also perfect timing in attacking, and all in tiny timeframes with no space for error.
Because the game is so well made, this can get frustrating, but it's the right kind of frustration that a difficult game should invoke, where the player knows that they are at fault, and not the game. If you want a hard,

very old fashioned platform game, Buster is definitely one of them. The maker, E. Hashimoto, later went on to make a bunch of fairly well-known PC games, such as Akuji the Demon, and Guardian of Paradise. He's also made a psuedo-remake of Buster, 11 years after the original. I say psuedo-remake, as though I haven't played it, footage I've seen shows that the graphics are completely different (in a good way), and the game looks like it plays very differently, with the character moving around and fighting enemies at very high speeds.