Metal Gear

Metal Gear (and later, Metal Gear Solid), is a series of video games created by Hideo Kojima and developed by Konami. In the games, the player usually takes control of Solid Snake, a special forces operative, in a bid to destroy various incarnations of a bipedal tank (a Metal Gear), although those in control of the Metal Gear and their motives are usually somewhat different. The main focus of gameplay is on sneaking and defeating enemies through stealth rather than brute force, offering a wide variety of different ways to avoid or get the drop on enemy sentries (most infamously, a cardboard box). As the series progresses, things tend to mess with the mind of the characters and the player to greater and greater extents.

This does not stop them being rather good.