Valkyrie Destruction

In the near future, humanity launched the "Prometheus Cell Project," a grand plan aiming for human enhancement and the advancement of civilization through the fusion of gene editing and artificial intelligence.
However, the experiment completely lost control, and an unknown "collapse factor" leaked from the experimental samples. This factor invaded organic cells and electronic devices, causing biological mutations and machine malfunctions, ultimately triggering the "Great Collapse."
Cities were devastated, nature was distorted, and science and technology ceased to function. Humanity was pushed to the brink of extinction.
The sole surviving AI, the "Star Core" Command Platform, is an artificial intelligence left behind by the experimental base at the time, storing some experimental data and information about the post-collapse world. It contacts the player, a survivor, via weak radio waves, guiding them to find the source of the collapse and a way to reverse the catastrophe.
The player is the last surviving cyborg, with a collapse factor resistance factor implanted in their body. They can function normally even in environments with high collapse concentrations and are the only being with the potential to stop the spread of the catastrophe.

Visual novel with hentai themes in which the protagonist is transported to an island inhabited by valkyries, with the mission of perpetuating their species. However, these fierce warriors will not give in easily: before accepting you—and having sex with you—they will challenge you to turn-based battles to prove your worth.
But it’s not all about strength. During battles, you must also answer their questions correctly to earn their respect and affection. If you have enough intelligence points in your stats, you can unlock one or even two different endings with each of them.
Win battles to earn money and purchase resources in the shop: improve your attributes such as strength and intelligence, and obtain potions that will help you recover health during combat.
Dive into this adventure and meet, face, and conquer four different valkyries, each with their own personality and challenges.
Single-player visual novel based on turn-based combat and multiple-choice decisions.

An intertwining, resonant serenade of love, sorrow, and fateful encounters calls forth a reboot for the future.
Step into the shoes of Rei, who wakes up in the Domed City of Initium surrounded by women calling him the Messiah. Determined to regain the memories he lost during years of cryosleep, he begins living with the six beautiful members of the TUNED (Tactical Unit for Neutralization and Enhanced Defense)—young women who wield so-called harmonic weapons.
Though lonely and confused in a world governed by enigmatic rules, Rei gradually finds comfort in his new companions.
Even so, he knows that something is amiss...
And it will only be a matter of time before the secrets of the world come to light.
"Valkyrie Tune: Synthesis of Souls" features
・An all-new visual novel story written by Akihiro Ishihara (Good Smile Company) and music by Shota Horie (PHYZ)!
・An immersive experience by visual novel developer Frontwing, the creators of the "Grisaia" series and "GINKA"!
・A cast of amazing voice actors that brings the story to life!
・A wide range of convenient features such as auto mode, skip mode, and text backlog to enhance your reading experience!
・Full HD (1920x1080) resolution support!

The strongest, most evil, cruel, and ruthless “Princess of the Apocalypse, Schulsture,” seeks to slaughter humanity and destroy the world.
While she is in the midst of her plan to end the world, a succubus calling herself Buzama, a so-called “out of nowhere” from another world, interferes.
The battle between Schulsture, who proclaims the end of the world, and Buzama, who aims to destroy Schulsture’s dignity, begins…!

Choose your favorite route from three succubus races, encounter beautiful succubi and strange semen-extracting creatures, change into cute and sexy crossdressing outfits, get defeated and violated, have your body become increasingly sensitive, feel happiness by eating delicious food, spin the gacha to buy skills, obtain magical artifacts with mysterious powers, conquer Paradise Island whose terrain changes with each adventure, and find the coveted “Cup of Sei”.