i will try this now,reply after tryhere if you afraid something like that will happen
Item
Events
Time - Every 300.00 seconds of game time
Conditions
Actions
Item - Pick every item in (Playable map area) and do (Actions)
Loop - Actions
If (All Conditions are True) then do (Then Actions) else do (Else Actions)
If - Conditions
((Picked item) is owned) Equal to False
Then - Actions
Item - Remove (Picked item)
Else - Actions