Syndemic is a randomly-generated action shooter that emphasizes upgrades, quick reflexes, and microbial puzzle-solving in a biological setting.
There are several missions in Syndemic that involve male and female gametes; aka, eggs and sperm. In one case, you will have to run interference for the egg while swarms of sperm enter the fallopian tubes. Some opportunistic bacterial and viral free-riders have made it inside alongside the sperm, and it's your goal to intercept them to prevent an infection.
Amazing.