There has been a long time between the launch of OSRS and OSRS Mobile. In those gap decades, some players, being the smart and RS Gold tech-savvy people that they are, managed to locate a way to play OSRS game on the telephone. Obviously, this doesn't have support from Jagex, but it is still pretty cool you could take your Gielinor experiences with you.
The principal version of Runescape is becoming a brand new event called The Grand Party now, including beloved NPCs like the arbitrary event Sandwich Lady and the celebration hat-wearing Wise Old Man. The Grand Party will dish out a package of buffs, as well as an anniversary cape and ensemble. This will start on January 25, also will operate alongside the Elder Gods arc planned for the year.
Speaking of Runescape's past: Old School Runescape, the alternate and proudly retro variant of the sport, can be getting some anniversary content. Starting this Wednesday, January 6, OSRS players can team up with the Green Gnome Child for"a trek through the original haunts of RuneScape to unlock the protagonist of Memories and struggle with dragons and demons, finish with rewards including a 20th Anniversary Cloak plus a Gnome Child dedication for player-owned house chapels." I choose to believe this really is Jagex's plan to officially enshrine one of the game's most recognizable (and memed) personalities, and I am not taking questions at this time.
Outside of the matches themselves, Jagex will even release a few anniversary merch, and also for me personally the headliner is a gold plastic pressing for 24 hand-picked Runescape tunes, such as the one and OSRS Buy Gold only Sea Shanty 2. Furthermore, comic book Dark Horse is partnering with the studio for a history of the match's first two years.