I'm not sure if you are aware, but r2da has lore. The lore is not in game though. Theres nothing really explaining the lore ingame, and it's basically all made up on this wiki. But what if there was more lore related things ingame? Let me introduce you to my idea: The Notebook. The notebook is a menu located on the menu screen of the game. When you click on it, a notebook opens up, and inside are written the names of maps. Underneath each name is a transparent note. If the note is transparent, that means you don't have it. Now you may be wondering "How do you get notes? What do they do?" Well let me tell you. You get notes from completing campaigns. If you complete a campaign and you haven't gotten the note for that campaign yet, at the end it will say something like "You found a note on the floor." and then show a note on your screen that then disappears. When you return to the menu screen, you can open your notebook and read the note. The note would be located under the name of the map you got it from, and it would say something to go along with the lore of the game. This feature could bring that story element that people have been wanting in r2da for quite a while. Maybe you could get a weapon for getting all the notes. (oh and it also encourages variety because if you want to be cool then you would play all of the campaign maps and get the things and get rewarded with lore stuff wooo yayyy)
Concept image: https://media.discordapp.net/attachments/697866442514890816/699718555079409754/notebook.jpg?width=912&height=560
Note: You do not lose notes upon prestige (haha get it note because its about notes haha)
check out my other suggestions
Highscore Revamp https://r2da.fandom.com/wiki/Thread:709149
Weapon Bonuses https://r2da.fandom.com/wiki/Thread:709123
Item Balancing https://r2da.fandom.com/wiki/Thread:709568