Minifigz is a set of rules for combat with Lego figurines.
Elfball Fantasy Football Rules
From Impact Games, Elfball is a set of fantasy “football” rules. It’s played on an oval field, so it’s not like “American Rules.”
Mobile Suit (MS) Era Rules
MS Era is a set of free wargames rules for playing with those Mobile Suit Gundam figurines.
Mini Rogue Print and Play Game
Mini Rogue is a free print and play card game “profoundly inspired by roguelikes and roleplaying games. ” The entire game is on nine cards, so there’s a minimal amount of printing.