There are many known glitches in Age of War.
Extra Units In Age Of War 2[]
In the Medeval and Rennessance ages you can get the locked people(mage and cannon) without paying for thier training facility.
Pause[]
If you hit pause over and over in Age of War 1 the enemy will not strike and your turrets can deal with them.
Immortality[]
In Age of War 1, if you intentionally lose (or win, in theory) in the Rennessance age, but activate the healing ability right before loss, then the next games you play will have your characters constantly regenerate like the ability is active, making them effectively immortal. This will last until you reload the page.
In theory, this could work with other abilities but it may be more difficult to perform as they deal damage, which may kill the enemies about to destroy your base.