Ya know, this delightful topic has come up before. To bad the old forums from early 2000-ish are gone. I believe we are on the third database/whatchamacallit forum?
Late 1980, I was 11. The game was Tunnels and Trolls.
I started that year in sixth grade at West Ottawa Middle School. This school was fairly cutting edge for the day. One of it's best features was mini-courses. Mini courses were two week long courses that were attended Tuesday-Friday during last hour (seventh hour). Monday we went our classes and on Tuesday-Friday they would rotate (if you had math for seventh hour Monday, you would have it Tuesday also and miss it, but come Wednesday Math would be your 1st hour course...followed by Communications, Gym, Science, Social Studies, then either shop, art, home economics or music lab for a semester, and then back to Math). Mini Courses were signed up for the first week of school. A booklet with a list of all course was provided. Needless to say, I couldn't pass up on a course called TUNNELS AND TROLLS.
The course was hosted by a 7th grade science teacher, Ms. Plakke. We were split into tables, told the idea behind the game, handed a rule book per table and asked to pick a GM. One group knew DnD and started gaming. The rest of us flipped through the rules and picked a GM, followed by making a PC on a 3.5" card. With Jeff Visser as GM, our party (looking back, a horrible mixture of ineptitude completely bereft of the slightest min maxing) consisted on an Elf, a fairy, a Leprauchan, a Human and my dwarf. Soon the human and I would be paste from a rolling rock trap and I would be hooked to ttrpg's.
I took the rulebook home for the weekend and ran my brothers and best friend through the small tunnel complex included in the rule book. Munchkins we were. I borrowed every solo module Plakke had and when the weather got warm enough, was on my bike and headed into town to peruse the hobby store shelves. I came home with box sets of Top Secret, Gamma World and Star Frontiers. Next year would lead to Runequest, which became our system of choice until MERP arrived. This was the middle of the 80's, a time when a new game system seem to hit the scene every other month, and we played most of them. I found RM, the 1st edition AL and SL with CL in a single bundle being sold at a computer store on consignment by a local college kid. I had wanted RM for a while and snatched up everything for $25.
Dedicated RM GM every since.