Day 20: First non-D&D RPG you played.
That would be Rifts.
And yes, I threw a Splugorth Slaver up against Alex's PC in the first session. How could I not? The damn thing was on the cover of the main rulebook! Alex wisely ran for his life and managed to flee, but not before nearly being incinerated by the Slaver's barrage of attacks. The drama that hung on Alex's dodge roll as he desperately threw himself over a cliffside to get away...man, I can still remember that, 22 years later.
There had been talk before that afternoon of doing alternating AD&D and Rifts sessions, but by the end of the day, we had become unapologetic Palladium fanboys and went full-bore with that Rifts campaign for quite some time.