As is typical for anything involving video games, I know nothing about RuneScape, so let me quote from the press release:
The games will draw on adventures, characters, and locations from across RuneScape's rich 21-year long history, with the board game taking 1-5 players on quest-based campaigns through Gielinor. They will craft and upgrade equipment, upskill their characters, cook special recipes, engage with NPCs, and test their skills while exploring different regions of the world, with a variety of enticing side quests to distract and entertain them on the way.
The TTRPG will consist of a lavishly illustrated, hardback core book containing rules for players to run a RuneScape tabletop roleplaying game in which they can build their own characters, explore Gielinor, and create unique and exciting quests. The TTRPG core book is also fully compatible with the fifth edition ruleset of the world's favourite roleplaying tabletop game.