Welp... Guess sense I asked for this, I'll review first.
Mon 1: "A hero arises to reclaim a world populated by monster girls... Aaaaaand contribute to said population!" Unfortunatly, this one's the worst. Each level's 5 rooms long, 3 with the level's monster girl, a mid-boss room, and level-boss room. Your only weapons are a gun, landmines (that is useless against half the bosses), and a crossbow that I personaly never used. Not that you'll be able to hit anything. I sware the hit-boxes are smaller then in the next game... The fact that your heath is also you time-limit is less annoying then you'd think, as the levels are rather short, but it does mean you're slaming that shift-key to sire your guy's half-breeds and get paid but not choke to death on the air. Which reminds me, perhaps the only advantage this game has is the extra air-cans, that'll replenish your health/timer. All in all, 2/5.
Mon 2: "The hero returns from retirement to save the world, and pay child support..." This is just better then 1 in just about every way. More monster-girls, bigger levels, better weapons, better hit-boxes, A KNIFE FOR CLOSE COMBAT... The only thing it doesn't have is the landmines, which is replaced by a granade-lancher that HITS FLYING FOES, and the air-tanks, which you find in the level instead of lugging around. I just recomend this one, 4/5
Mon J: "Oh Lord, he's breeding the Yokai now..." Mechanicly, this is the most sound. It's a side-scroller, so you're probibly gonna hit your mark unless their on a slighly higher/lower plain then you, in which case reajust. You've got plenty of health/time... It's just solid, all & all. That said... It's a bit easy. Again all your hits land for the most part, so you kinda just end up in a loop of: "Go right, swing knife a Yokai, maybe shoot at Yokai, press e then shift to contribute to the genetic disaster your causing" rinse and repeat until you can be traced as the source of Yokai Hapsberg. It's still fun, just far less chalanging. 3/5