Here is the full list of all 16 Cymatically Muffed achievements.
50 Muffed Kills in 1 Session
100 Bullet Kills in 1 Session
100 Melee Kills in 1 Session
100 Explosive Kills in 1 Session
20 Rocket Kills in 1 Session
10 Bomb-Detonation Victories in 1 Session
20 Battle Kills Without Dying in 1 Match
2 Quick Consecutive Kills
3 Quick Consecutive Kills
6 Quick Consecutive Kills
9 Simultaneous Players
16 Simultaneous Players
Campaign Completed
Collect All DOS Game Disks
Collect the Zephyr
Collect 500 Throwable Objects in 1 Session