Here are all passwords for each level:

river                       : 3R4RW7TBK3HSPLH
plateau                     : LLPPGZ4CMBBRGCD
Pendawood                   : XC9NDHRSWNNSCJT
the village Fyrd            : SBQKP6PQHCHBHX3
mountainpeople              : XDP4KZQQVFQRB7S
the village Ulather         : KGKBDP4QWZ737XC
Chanon Swamp                : 7GV7BV3LDCVFLN3
tomb of Camelot             : GCCCLQDQMD3BWR3
battle field                : J643ZTSHZPK46MN
Caer Einonoch               : 3KBCDHJP7CBG9FF
castle complex              : B9DGXDVLQH9JS6M