Here is the full list of all 21 Typefighters Steam Edition achievements. It takes around 1-2 hours to unlock all of the achievements on Windows.
Complete multiple lines at once [Lines mode].
Play against someone on another platform.
That line barely moved [Tug mode].
Play a multiplayer game.
HL3 confirmed?
It's the name of the game.
Win all modes in a single match.
Guess right most of the time [Guess mode].
Play all modes in a single match.
Play a round where both players reach 40 GWPM or more.
Win a round with every word finished in less than 2 s [Attention mode].
Win a round without any word leaving the screen [Stream mode].
Win a round with 100% accuracy.
Fully customize the color scheme.
Win a close game.
Shoot down all enemy projectiles before they reached the middle of the screen [Projectiles mode].
Use a custom dictionary.
No points for your opponent.
Create words starting with every character of the alphabet in a single round [Creative mode].
Win a singleplayer game at maximum game and AI speed.
Win a round using words with 8 characters or more only [Reflect mode].