This game is the Puzzle game on www.flash-games.net. Use the mouse to slide tiles and guide our hapless engineer to the rivets. You can use the spacebar to double his speed if you are running out of time. Concrete five bridges each with five levels, all with only five lives. The online game Grid Iron is a free game to play on PC, Mac or Laptop computers. You can read the game comments below on Grid Iron, which may contain cheats and tricks, cheat codes, tips and full game solutions. You can play Grid Iron for free on Internet, or download this game on your computer to play it off-line.