Press [CTRL] + [SHIFT] + [C], when you hear a 

sound, enter the desired cheat: 

Code         Result

------------------- 

gold         - Max Gold.

mana         - Max Mana.

explore      - Reveal Map.

fog          - Disable Fog.

research     - Research All Spells.

win          - Win Scenario.

lose         - Lose Scenario.

freemove     - Free Movement.

towns        - View All Towns.

spells       - Free Spells.

instantprod  - Instant Production.

instantres   - Instant Research.

ai           - Toggle AI.

upgradehero  - Upgrade Hero.

cityspy      - Spy on Enemy Cities.

emergehero   - Summon hero spell.

Achievement - How to unlock
Blood Ninja - Successfully Backstab 10 Enemies.
Bloodline 100 - Reach Bloodline Level 100.
Bloodline 25 - Reach Bloodline Level 25.
Bloodline 50 - Reach Bloodline Level 50.
Bloodline 75 - Reach Bloodline Level 75.
Collector - Find all of the Blood Fragments.
Destroy the Darkness - Destroy the Emperor.
Destroyer - Destroy 1000 Monsters.
Exterminator - Destroy 500 Monsters.
First Blood - Sire your first Family member.
Fledgling No Longer - Reach Bloodline Level 5.
Full Family - Sire 4 into your Family.
Going Deep - Reach Sub-Floor 10 in Any Dungeon.
Hunter's Apprentice - Player Killed 20 Enemies.
Lust for Greed - Carry $1000.
Lust For Power - Become the New Emperor.
Skilled Thief - Successfully Pick 10 Locks.
Skilled Vampire - Reach Bloodline 10.
Sub Floor 100 - Reach Sub Floor 100 in any Dungeon.
Sub Floor 20 - Reach Sub Floor 20 in any Dungeon.
Sub Floor 40 - Reach Sub Floor 40 in any Dungeon.
Sub Floor 60 - Reach Sub Floor 60 in any Dungeon.
Sub Floor 80 - Reach Sub Floor 80 in any Dungeon.

Effect - Screen - Code:
Extra damage to random enemies - Land or boarding battle - [Ctrl] + [F4]
Level up - Statistics screen - [Ctrl] + L
Money - Inventory - [Ctrl] + X
Teleport to pointer location - Map - [Ctrl] + Left Click

Achievement - How to unlock:
A Convenient Perch - Land your ship on a floating rock.
Broadside - Fire ten heavy cannon at once.
Conquer the 'Net - Win a multiplayer battle.
Forced Landing - Force down an enemy airship.
Heraldry - Register your coat of arms.
Smash the Skies - Completely destroy an enemy ship by ramming it.