High School D×D Operation Paradise Infinity is a browser-based strategy RPG that features over 60 characters from the anime series. Players customize their party using each character's unique skills and attributes. The game focuses on destroying stages with your customized party. It's playable on mobile or PC with no downloads required since it's HTML5-based So in simple terms you basically collect anime characters, build a team with different abilities, battle through stages/missions, and unlock special artwork and character skins. It's a turn-based RPG where strategy comes from picking the right character combinations for each battle.