Level passwords -

Level - Ecks - Sever
2 - EXTREME - SEVERE
3 - EXCITE - SURVIVE
4 - EXCAVATE - SAVANT
5 - EXCALIBUR - SUFFER
6 - EXTORT - SULPHER
7 - EXPIRE - SERVE
8 - EXACT - SEETHE
9 - EXHALE - SEVERAL
10 - EXHUME - SEVERANCE
11 - EXONERATE - SAVAGE
12 - EXPEL - SACROSANCT

Multi-player passwords -
VULNERABLE
VORACIOUS
VENDETTA
VIOLATE
VINDICATE
VESUVIUS