Here is the full list of all 20 eBall achievements.
Kill 10 enemies with bombs!
Kill 50 enemies with bombs!
Kill 100 enemies with Bombs!
Deal 10k damage to enemies!
Deal 50k damage to enemies!
Deal 100k damage to enemies!
Die 10 times!
Die 50 times!
Die 100 times!
Kill 50 enemies with rockets!
Kill 100 enemies with rockets!
Kill 500 enemies with rockets!
Kill 10 enemy!
Kill 100 enemy!
Kills 500 enemy!