Long, short story:
Am bad-to-average FPS gamer, looking to improve. Saw an OSU! gamer flinging its “shots” left and right and tried my best to mimick the experience in an FPS. And it worked significantly – all of my shots felt more “secure”, even with my aiming being rusty beyond belief.
And the “trick” to do this is simply leaving your “aiming hand” to aim (ONLY) while leaving your “non-aiming hand” to shoot and everything else. That’s it.
Take this with a grain of salt, but a few years ago, I remember a discussion in /r/overwatch where someone said they practice sniping by playing osu.
Oh yes…don’t get me wrong. I think OSU can be a great tool to practice aiming. I’ve seen League of Legends players using it to farm better too.
It’s just that I don’t think one can play a FPS like they play OSU. They have more “dimensions”, I guess.
Its not that they have more dimensions, realistically they only have x and y, the third dimension just changes the size of the target.
Its really about having more inputs on the left hand, in osu iirc you only had two buttons.
In my experience, while osu is a good warm up it’s not a substitute for a 3d aim trainer. Unless you are using mcosu with some modifications - using the fps mod and making the circle size smaller, among other things - the aim in osu doesn’t transfer one to one to shooters. While it certainly helps getting the hand movements like the flicks and such ready, 2d just isn’t the same as 3d since you can’t even map the sens to be the same, its kind of impossible actually.
He has a video of him playing Apex Legends: https://www.youtube.com/watch?v=BvezoGUtTTg