docs/manual/platforms/switch.md
devilutionx.nro into /switch/devilutionxdiabdat.mpq from your CD (or GoG install folder) to /switch/devilutionx.Launch devilutionx.nro. (Do not use album to launch; see the note below.)
Note: Hold R on any installed game and launch it. Do not use album to launch. If you use album, the homebrew will only have a small amount memory available, and the touch keyboard won't work. This is true for all homebrew, not just DevilutionX.