Nicemetal is a tower defense game with an interesting gimmick, originally created by babarageo for distribution at Comiket 76. There are a number of unmanned defensive structures in each map, and you have to send out soldiers to operate them for a short amount of time before they'd return back to base.

Enemy robots will attempt to break through your defense, so it is just a question of managing your limited resources and destroying your adversaries before they reach the front gates. Your troops can only move in a straight line, and an enemy robot will have no hesitation when it comes to crushing them with their feet if the two ever meet.

You'll have to skip two cutscenes first before access to stage one is given at the main menu. There are six levels to play in total.