Ecks vs. Sever Cheats & Tips

Level 2: EXTREME
Level 3: EXCITE
Level 4: EXCAVATE
Level 5: EXCALIBUR
Level 6: EXTORT
Level 7: EXPIRE
Level 8: EXACT
Level 9: EXHALE
Level 10: EXHUME
Level 11: EXHONERATE
Level 12: EXPEL
FINAL PASSWORD: VIOLATE

Level 2: SEVERE
Level 3: SURVIVE
Level 4: SAVANT
Level 5: SUFFER
Level 6: SULPHER
Level 7: SERVE
Level 8: SEETHE
Level 9: SEVERAL
Level 10: SEVERANCE
Level 11: SAVAGE
Level 12: SACROSANCT

1 VULNERABLE
2 VORACIOUS
3 VENDETTA
4 VIOLATE

the sniper rifle can be used to view through solid objects and walls allowing you to shoot enemies several rooms away.
Simply get as near as you can to a wall and switch on the rifle. Then pan across left or right and hey presto ! x-ray specs!