Populus: The beginning Cheats for Playstation
At the Main menu begin a game and select the 'Journey Begins' scenario. Move the arrow onto a tree and press 'X', do this on every tree in the level and then press 'Start' to display the 'Options' screen. If you have done this correctly the last option will be 'Cheat'. This is a cheat menu with options for Maximum Mana and ALL Spells and buildings.
Right this cheat so so easy to compleat this game so here it is...
At level 1 click on every tree that is there when this works you here a noise then you can press start then go down to cheats and then click on all three of them