Here's a quick gaming glossary then:
Warhammer - fantasy wargame, just like those games that painstakingly recreate the battle of Waterloo, except with goblins and dwarves and enjoyment.
Risk - a famous board game of world domination.
Painting orcs - Warhammer can use painted lead miniatures as representative game pieces. And you paint them.
Stunty - Orcish term for a Dwarf - hence King Stunty, arch-enemy of King Stomper (Jon's painted nemesis and superhero character respectively).
Half-Elf Ranger - one of many possible character classes from Advanced Dungeons & Dragons, the mother of all role-playing games. If Strider's a Ranger and Arwen's an Elf then Jon's AD&D character might just be their love-child...
Bob