|N version||1.2 and later|
Method 1 (Easy)
This is a fairly difficult follow-up to isthmus. At the beginning, get as much gold as possible, then walljump up to the exit switch. Fall down the middle shaft to the bottom, which is patrolled by two guided zap drones. Jump over the drones to collect all four switches - unfortunately, two of them free and additional two zap drones. The drones are very difficult to pass in the middle area due to the slopes, so it is best to lure all four drones into the bottom area before escaping. To expedite this process, lure the drones as they come out from their cage. With a bit of patience, you should have grouped all four drones at the bottom; then quickly climb back out and enter the last room.
The last room is just a homing turret amongst a minefield. The easiest and most common way to defeat it is to drop in between the two mines beneath the turret, and then to bounce off the wall to the exit.