TipofmyJoystick - What was that game called again?

I've been trying to recall a game I played briefly as a kid at a friends house.

I feel like it was similar in style to Settlers 4 with an isometric view, typical click and drag a square around who you want to control, and a focus on building and combat. What makes me think it wasn't Settlers 4 is I don't recall it having that kind of cartoon style and I vividly remember there being some kind of cheat code that would reveal the map.

The reason I say it's around 2006 was because I originally went to buy it in a Future Shop (a Canadian store that was bought by Best Buy) but my mom said I should get Civilizations 4 instead because she recalled my uncle talking about it.