10 Video Games You Didn't Realise Are 10 Years Old

2. Half-Life 2

If you needed any more convincing that 2004 was one of the best years for the industry (before the next entry, anyway), look no further than the unveiling of Half-Life 2, Valve's physics-based playground that completely revolutionised almost everything about first person shooters. With great character designs and interactions that were done entirely in the first-person, it really put you in the shoes of one Gordon Freeman as he got lost in a world of social oppression and high tech gadgets, letting you form a bond with lead female Alyx and her pet robot Dog (who wasn't a dog) along the way. All of that and we haven't even mentioned the combat which is the meat of the game, and what you'll be doing the most of. It's a great indicator of how replayable HL2 is that the physics of the world and the way the weapons handle are just so laser-focussed and weighty, it never gets old to use the Gravity Gun to pluck any number of objects off the ground and fling them at your adversaries, along with utilising a range of heavy-duty weapons to fell your foes.