So you reckon you're a big Halo (opens in new tab) expert, able to tell your Spartans from your Prometheans? But how well do you really know Chief? You might have played everything since the first Halo: Combat Evolved (opens in new tab) first arrived in 2001, but with 21 games (including remasters and spin offs) since there's a lot to know. If you think you can spot the difference between a Type-50 α sniper rifle and a Type-50 δ sniper rifle then this is the challenge for you. Try your luck and let's see what you score.