Cheat mode:-  Press Start during game play and select the password option. Press C to enter one of the following passwords to activate the corresponding cheat function.

Effect Password 

10000 gold. 5000 lumber, 5000 oil GLTTRNG 
All spells, full mana VRYLTTL 
Disable complete victory NVRWNNR 
Disable magic traps NGLS 
Display full map NSCRN 
Faster woodchopping HTCHT or HTCHTXNS 
Flashing red line background NTPRF 
Full upgrades DCKMT 
Invincibility, boost unit strength TSGDDYTOD 
Level skip NTTHCLNS 
Lose game YPTFLWRM 
Quick building and upgrade MKTS 
Win entire game THRCNBNLYN 

Tides Of Darkness Passwords:

Level Human Orc 
1 HLLBRD ZLDR 
2 MBSHTM RDTHLL 
3 HSTHSH RCSTHS 
4 TTCKNZ SSLTNH 
5 HTLBRD RCTLBR 
6 DNLGZ BDLNDS 
7 GRMBTL FLLFST 
8 TYRHND RNSTNT 
9 BTTLTD RZNGFT 
10 PRSNRS DSTRCT 
11 BTRYLN DDRSSQ 
12 BTTLTC TMBFSR 
13 SSLTNB SGFDLR 
14 GRTPRT FLLFLR 
Ending LLRSJR 

Beyond The Dark Portal Passwords:

Level Human Orc 
1 LLRSJR SLYRFT 
2 BTTLFR SKLLFG 
3 NCMRNT THNDRL 
4 BYNDTH RFTWKN 
5 SHDWSS DRGNSF 
6 FLLFCH NWSTRM 
7 DTHWNG SSFZRT 
8 CSTFBN SSLTNK 
9 HRTFVL DPTMBF 
10 BTTLFH LTRC 
11 DNCFTH YFDLRN 
12 BTTRTS DPDRKP