The A=01 is the cipher and the level is asking you enter C-O-D-E where C=03, O=15, D=04, and E=05.

Embark on an inspiring mission of human connection beyond the UCA. Sam — with companions by his side — sets out on a new journey to save humanity from extinction. Join them as they traverse a world beset by otherworldly enemies, obstacles and a haunting question: should we have connected?