Fascinating videogame with an absolutely unique atmosphere.
Composed of ten thousand levels, it is placed on a scenery made of mountains
and plateaus. We find ourself at one of the lower plateaus and our task is to
climb up, while on the top of the tallest mountain there is the Sentinel that,
slowly but inexorably, turns its face toward us to suck our vital energy.
The only way to defect it is to climb to its level and absorb it. To go up
we have to target a plateau base, materialize a robot on it, exchange us with it
and finally resuck it to regain the energy used.