Move beyond Forgotten base 20 level challenge

AIGDestroyer

On world 19 it does not register as you having moved beyond the level 20 forgotten base area , .

chadthurston

the level 20 area isnt always at the level 20-25 bases, depending on the map size and shape it could be as far as near the base 30s. i think its activated after reaching one of the depth lines on the world map.