I learned memory techniques by playing games initially. So I have a lot of techniques related to so to say ‘innervating fine motor motions’ along with basic game principles.
It is absurdly important if you are serious about becoming one of the best players in almost any game.
In games like tekken and mortal kombat, dragon ball even smash bros. If you can memorize peoples habits completely and update to them in real-time you perform significantly better, you get an awareness of what they will do and you can read them much better. Your own motions become a lot less predictable and you become significantly less mindless. It is particularly crucial when you go beyond a level of simply being able to perform commands, since it becomes much more a game of prediction and active thinking. There are many other factors, such as adjusting your timing and rhythm along with more.
Some games have particular combinations people have spent in some cases over 3 years of time everyday to develop capability with. If you can do this in a single day, which indeed is the case when you know how things work, how you can get your body to memorize the key presses and execute them more efficiently, in that case, you then have a significant incomparable advantage over them in any game that requires skill. This applies to games like Counter-Strike too, if you know how you can develop your aim much more effectively you will perform better over time to someone else. In a lot of games, some people improve and stay there or regress never going above what they were prior because they 1. Do not know what they are doing(albeit they instinctively do), 2. Their skills regress (No real ideal of how to maintain or develop ability). In those two aspects, memory can definitely be a significant aid.
I don’t particularly play these, however if I approached them I would memorize the table of data regarding all particular numerical values (range of motion,damage,hp,speed,frames and so on). After this I would create a method to calculate precise ranges making use of time and train myself to spot them in match. This feat is akin to memorizing 3000 Chinese characters and learning to speak the language, just a bit heavier arithmetically. It takes a lot of memory, actively of current positions and practically to build the system.
In theory then I would not lose provided I could do the arithmetic quickly enough, and could monitor the map quickly enough and my team was cooperative enough compared to the opposition.