If you play any games on your computer, then odds are high you are familiar with using the WASD keys for directional movement and the space bar for jumping.
If someone is moving forward (W) and strafing to the right (D) while jumping (Space), they will have reached the key rollover limits of their 3KRO (3 key roll over) membrane-based keyboard.
This means that if they ALSO try to fire off one of their abilities (let's say they have to press "1" to activate their ability), they won't be able to activate it unless they first let go of one of their movement keys.
This is a lot less noticeable in a more advanced keyboard that can do 6 key rollover. It's pretty rare that someone is going to be performing 6 simultaneous actions in a game.
If someone is moving forward (W) and strafing to the right (D) while jumping (Space), they will have reached the key rollover limits of their 3KRO (3 key roll over) membrane-based keyboard.
This means that if they ALSO try to fire off one of their abilities (let's say they have to press "1" to activate their ability), they won't be able to activate it unless they first let go of one of their movement keys.
This is a lot less noticeable in a more advanced keyboard that can do 6 key rollover. It's pretty rare that someone is going to be performing 6 simultaneous actions in a game.