UnMetal

UnMetal is a top-down stealth action adventure game that can unofficially be called a parody of Metal Gear Solid. In 1972, a squad of Vietnam veterans put you in prison for a crime you didn't commit. None of these mercenaries even blinked an eye as you escaped from their sophisticated prison and ended up in the sewers. What starts out as a simple escape ends up being immersed in a serious operation to prevent sabotage against the Alliance.