User blog comment:The Milkman/Multiplayer Ideas/@comment-1503545-20120428205353/@comment-1888392-20120429043646

That would be awesome but do y'know what would even make it better? Maybe these accomplishments would affect gameplay like Mass Effect 1's achievements that bolstered your strength a certain amount. The challenges would have three different levels, like the medals in MP, that require varying requirements.

For example, if you score 100 headshots with the Avenger, you get a permanent 5% damage boost for all future Avenger headshots. Once you get 250 headshots, you get a permanent total of 10% more damage. Once you max it out at 500, you'll permanently deal 15% more damage with headshots if you're using the Avenger. Imagine the possibilities!