THE OREGON TRAIL (1971)
ORIGINAL BY DON RAWITSCH, BILL HEINEMANN & PAUL DILLENBERGER
2025 RECONSTRUCTION BY PHIL SPILSBURY
1971: Don Rawitsch, Bill Heinemann, and Paul Dillenberger create the original game in just two weeks for 8th-grade history students at Jordan Junior High School in Minneapolis.
The trio worked on an HP 2100 minicomputer using teleprinters - no monitors! Students played in groups, voting on decisions and delegating roles like hunting and supply tracking.
1974: Rawitsch recreates the game for MECC (Minnesota Educational Computing Consortium), adding historical research and accurate probabilities based on pioneer diaries.
The game became the most popular educational software in Minnesota schools for five years, with thousands of monthly players.
1975: MECC distributes the game across Minnesota schools via time-sharing network.
1978: Rawitsch publishes the source code in Creative Computing magazine, making it available to the world.
The game was so popular that students would line up outside the door for their turn and stay after school for another chance to play!
Future musician Prince was one of the students who tested the original game at Bryant Junior High School.
The creators weren't publicly acknowledged until 1995 when MECC honored them at the Mall of America.
Over 65 million copies of Oregon Trail games have been sold, and the series is in the World Video Game Hall of Fame.
Fun Fact: The original game was deleted from the school's mainframe at semester's end - Rawitsch had to recreate it from printed code!
Data on the Oregon Trail was collected from books and diaries and provided accurate information regarding the cost of goods, types of supplies to buy, and the frequency of disasters (i.e. bad weather occurs 20% of the time and injuries 5% of the time in the diaries, so they occur at the same rate in the game). The code also detects where the player is on the trail and adjust random events accordingly (i.e. it snows in the mountains and river disasters occur on the plains).
Unlike the graphical version, the original version was text-based. Each turn, players would type their choice (stop, hunt, or continue; eat well, moderate, or poorly) and the game would load an event subroutine to let you know what kind of disaster occurred this turn. After making a choice in the event sequence, the game tallies up the results and continues until the player either dies or reaches Oregon.
This reconstruction preserves the original game logic while adapting it for modern web browsers. The JavaScript implementation maintains the exact same probability distributions, event sequences, and mathematical formulas as the 1971 BASIC version.
The web version features a retro terminal aesthetic with CRT scan lines and authentic green-on-black styling. Interactive shooting mini-games use real-time timing, and the historical sidebar provides fascinating context about the game's educational legacy.
Multiple platform ports are available: HP BASIC (original), Commodore 64, Sinclair Spectrum, and this HTML5/JavaScript version - each preserving the authentic gameplay experience across different computing eras.