In the year 2040, a full-dive VR MMORPG called Giantess Age Online was released. This MMORPG was only for people over 18 due to it having inappropriate content but it's still fairly popular due to it having some very unique features.
Every monster and enemy in the game was a woman with most of them having humanoid shapes.
However one of the most interesting features was that whenever someone killed a monster, monsters of that same type would grow in size according to a multiplier that was set on the server. There wasn't a limit to how high the multiplier could be which led to some servers with higher multipliers being reserved for veterans of the game. The growth multiplier does have a set reset time so that things don't get too crazy and too difficult.
Obviously whenever a monster grows in size, their levels and stats would change to fit their new size with bigger monsters even getting their own names and being classified as boss monsters.
Giantess Age Online was also pretty interesting due to the fact that each server was it's own world with its own themes, monsters and quests. Due to this the game stayed pretty relevant and updates were pretty frequent making Giantess Age Online one of the most frequently played full dive MMOs in the world.