There's a new Gal Gun game coming out in two weeks. Demos are up for Vita and PS4.
I tried both versions and wow...this is one shitty game!
I never played the original, but thought it was just some perverted light gun shooter. It is, sort of, except you now just use the analog stick to move around static backgrounds and shoot various girl bodyparts. The game then goes into another mode where you literally molest girls and fill up a gauge by touching naughty parts, which then makes them appear to orgasm. And uh....I stopped and deleted the demo here. The game looks like shit on PS4 (exactly like the Vita version, awful textures and all) and has atrocious load times on Vita.
But I do still want the Mighty Gal Gun game coming out at the same time, which is just the Sony version of Mighty Gun Volt on the 3DS.