Level 1 Canyonlands: (none)
Level 2 Babylon: LGSXRTNR
Level 3 Russian Border: MDTSVTTP
Level 4 Tian Shan River: MGVWVZNX
Level 5 Shambala Sanctuary: NGVSV2S2
Level 6 Palawan Lagoon: SDWXWTJM
Level 7 Palawan Volcano: RDSPRZZP
Level 8 Teotihuacan: RGWTQTNX
Level 9 Olmec Valley: RCQQR2TX
Level 10 V I Pudovkin: NLPXSVJP
Level 11 Meroe: NJNRXVZM
Level 12 Nub's Tomb: PLVWXVNX
Level 13 Infernal Machine: TJWRTZJM
Level 14 Aetherium: QHTVSTTP
Level 15 Return to Peru: SLPSRWPT