this was in csgo as a modded server and it helped my aim immensely its when its constant 1v1 battles on arenas,

and they are little aim maps

•person at the top of the leadboard verses person 2 and so on

•you 1v1 someone, if you win you move up on the leaderboard

•if you lose you move down

•everyone who is best at aiming keep 1v1ing eachother up the top of the leaderboard

i feel as this is an EXTREMELY good mode to get better as youre constantly peeking someone in a realistic scenario in a small aim map rather than deathmatch being people everywhere at different times and spawning behind you.