Larn is a roguelike computer game authored by Noah Morgan in 1986 for the UNIX operating system. Morgan's original version of Larn remains part of the NetBSD games collection. src/games/larn/. NetBSD CVS Repositories. Accessed January 18, 2008. Larn is one of the shorter roguelike games. It can take many hours and tens or even hundreds of thousands of game turns to win a game of NetHack or ADOM, but Larn can reasonably be completed in one play session. History Primary development of Larn halted… (More on Larn)