The War in Heaven is a Christian-themed first-person action game set in a pseudomedieval fantasy world. Based on the Christian fantasy novel series of the same name by Theodore Beale, players are confronted with hissing horned monsters wielding swords and other weapons. The gameplay is straightforward and there is a limited selection of weapons and levels. Many of the characters' names are taken from the Bible.
Players can choose to follow "The Divine Path of Obedience" and become an angel, which progresses the player up the 12-level ascent to Heaven. Alternatively, the player can opt for "The Fallen Path of Power," follow Lucifer, become a demon and war against angels.