While at the tactics screen, type iguana and then enter one of these codes:

Alt+E - shows all units and objects on the map
Alt+T - teleports the selected unit to where your cursor is located
Alt+R - replenishes your unit's ammunition
Alt+D - replenishes your unit's action points
Alt+O - eliminates all enemies in the sector
Alt+G - call in a new mercenary
Alt+I - a random weapon will appear
Alt+K - creates an exploding gas grenade where your cursor is located
Ctrl+K - creates an exploding hand grenade where your curor is located
Alt+Q - shows you the interior of all buildings
Ctrl+F - shows frame rate