Weld a 'wall of death' to survive a deadly demolition ball you shouldn't risk your safety when welding in real life, but in our newly developed game tig welder you'll be doing whatever it takes to weld a wall strong enough to save your life from a demolition ball. tig welder is free to play on www.tradesgamer.com, and no matter how much you've weld in real life, there's no guarantee you can survive the challenge. give it a try if you think you have what it takes - but you have been warned! developed by competenz – new zealand’s industry training organisation for the engineering, food and manufacturing sectors. * recommended for ios 6.