Original name is かりんとあそぼ！, also remember to set your PC on Japanese Uni-Code. Very good gameplay, with collectible skills and weapons and some very hard jumps.
The game is in English, but there's no text apart from the start screen and the in-game menu.
2D beat 'em up with retro graphic, but lots of scenes including classrooms, gymnastics, swimsuit, school uniform fetish.
Jumping is a bit chunky, and remember that on the first level you can kick the shoes back to eliminate the enemies too far away (or you'll never reach the first boss, which is gonna defeat you anyway).
The actual sex simulation gameplay is pretty standard. You can browse the online repository of other players' heroines and date, then ultimately steal them. The game's dialogue is very mediocre and unimportant. The game also comes with one of the best character creators on the market, also featuring online options for finding more outfits and features.
ZONE games aren't really games, but sweet Jesus does 4chan love them and each one is well-made. Another Illusion game, so it's good stuff as usual.
You can create a classroom with 25 students complete customizable (the male customizations are really poor compared to the female ones) and then see how they react with each other.
Freeware Metroidvania game where you play as a young girl named Marie, trying to escape from a facility full of spikes and killer laser robots. ) that will protect her from hazards but gets torn off in the process, leaving her topless, bottomless or completely naked.
The game is very difficult, but provides infinite quicksaves and has very tight controls; as a bonus Marie's current level of nudity is reflected in cutscenes and the ending, so you're rewarded for playing dangerously.