This manifesto addresses the global decline in humanities investment by way of one of its relatively novel but underfunded sectors: “immersive” or playable theatre. While traditional, proscenium-based theatre faces a cultural crisis, immersive experiences and playable theatre continue to suffer from a lack of legitimacy. The manifesto emphasizes how pivotal such productions are to re-kindling passion for drama and literature among a new generation of theatre-goers accustomed to playable media. The time for long-term institutional support for the large tent called “immersive” is now.