Digging through my own archive of BASIC listings I think I've found a version of Oregon that pre-dates Atom 20: 10 REM O R E G O N ** 1/1/76 20 REM

Digging through my own archive of BASIC listings I think I've found a version of Oregon that pre-dates Atom 20: 10 REM O R E G O N ** 1/1/76 20 REM ORIGINAL PROGRAMMING BY BILL HEINEMANN - 1971 30 REM SUPPORT AND RESEARCH MATERIAL BY DON RAWITSCH So while it was an amusing thought that Atom 20 might have inspired Oregon Trail, it's looking unlikely at this point.