You may have heard the term “lambda” in maths class. In ‘Half-Life 2 – The Orange Box’ this term gets a whole new meaning. Wear this t-shirt with its lambda symbol on the chest and you’ll have way more fun while playing your next round of ‘Half-Life 2’.

You can buy this t-shirt from emp-online.com
 

Half-life had a lot of influence over the entire first-person genre as a whole. The crowbar finally got it’s time to shine where usually there had only been chainsaws and swords and pointy thinks. The protagonist was a theoretical physicist, complete with glasses and intelligence gathering facial hair. With his HEV suit and his wits Gordon crowbared his way into our collective gamer hearts.

You can buy this t-shirt from jinx.com