Press the letter to fire. Protect your base. New keys join every wave.
How to play
Letters drift down towards your base. Press a letter on your keyboard to fire at the lowest invader showing that letter. If an invader reaches the base line you lose a shield; lose all three and the game is over.
What each wave trains
Waves
Keys
1–2
Home row: A S D F G H J K L
3–5
Home row + top row
6–8
All letters
9
Letters + numbers
10+
Capitals (shift), letters and numbers
Grades: reach wave 3 for a C, 6 for a B, 9 for an A and 12 for an S. Ready for words? Try Word Rain or the touch typing lessons.
Frequently asked questions
Is Key Invaders good for beginners?
Yes. The first waves use only the home row, then add the top row, bottom row, numbers and capitals. It's a fun way to learn where every key is without looking down.
What happens on boss waves?
Every fifth wave ends with a boss: a whole word that moves slowly towards your base. Type the full word, letter by letter, to destroy it for bonus points.
Why does my turret turn red?
Pressing a key with no matching invader jams your turret for a moment and resets your combo. Aim before you fire!