This is a WebAssembly port of the original Colossal Cave Adventure by Will Crowther. It is based on Fortran IV source from March 31, 1977 and is written in Rust.
Play Colossal Cave Adventure
Input is restricted to UPPER CASE ONLY just as the original was. Useful features of later versions, such as scoring, are not present, as the goal was historical accuracy.
A portable command-line version written in Rust is available here.