Does it not cost a lost to store? Anyway i just don't want it to be deleted, i have a lot of history here :')

past games are saved in a magical thing called a database, they individually dont cost a lot to store. nothing will ever be deleted, those games will probably outlast you.

Multi-player games are saved on the war.app servers. Some time after the game is finished, they're archived, which means they're compressed for long-term storage. The game has been running since 2008 and I've never had to delete a game due to the cost to store, and hopefully I never will!