Starter Kits

Free Starter Kits/PDFs

Shadowdark (fantasy) - Quickstart guides for players and GM along with pre-made characters and a beginner adventure.
Nimble (fantasy) - Quickstart Basic Rules with a couple adventure quests and a couple of characters. Page also has some videos to help.
MUTANT: Year Zero (post-apocalyptic) - Basic rules, some characters and an adventure. There are free quickstart PDFs available for most, if not all, of Free League Publishing games.
ICRPG (fantasy) - Free quick start and a lot of community content.
DC20 (fantasy) - Playtest rules preview + one-shot adventure.
Savage Worlds (weird west) - Generally a more genre neutral system, this free kit can get you started with everything you need.
Fabula Ultima (JRPG) - Basic rules, pre-gen characters and an introductory adventure.
Dungeons & Dragons (fantasy) - Intro videos, free rules and a free adventure.

D&D Heros of the Borderlands (fantasy) - Being dubbed a “board game”, this box set in digital or physical form has everything you need to get started.