Nightdawn

In Nightdawn , the player takes the role of an engineer who has to prove
that his remote-controlled tank is better than the previous model. To do so,
he needs to master a series of top-down mazes. The goal of each level is to
find the exit, but it is secured with locked doors and energy barriers.
Navigating the maze and finding the means to overcome the doors (finding keys)
and barriers (finding switches) is the main challenge of the game, but there
are also mines, turrets and patrolling robots. During the course of a level
there are optional and needed upgrades to find, e.g. a cannon (initially the
tank can’t shoot), a mine detector, extra energy or a radar.