With less than 24 hours to go until the greatest rock and metal festival on the planet kicks off we’re continuing to bring you the rushonrock guide to the must-see bands at Download 2010.

And despite a series of patchy shows in the UK during the last 12 months there are few mightier metal monsters than thrash legends Megadeth.

Main man Dave Mustaine continues to write some of the best heavy music on the market and his angst-ridden attitude hasn’t waned over the years.

But perhaps he’s becoming just a little mellow – this summer sees a hatchet burying of sorts as he plays live shows alongside former employees Metallica. We feel Megadeth are due a big UK show and Saturday’s Download set could be it. Read on for our guide to the US giants.

Name: Megadeth

Home country: USA

Download 2010: 17.05-18.15, Maurice Jones Stage, Saturday June 12

Classic Album: Peace Sells…But Who’s Buying?

Classic Track: In My Darkest Hour

Don’t Mention: Kill ‘Em All – the monster Metallica record released just after Mustaine left the band

Do Mention: Killing Is My Business…And Business Is Good – the triumphant Megadeth debut which proved Mustaine still cut the thrash metal mustard

Look Out For: A smile from the most miserable frontman in rock

Avoid: Criticising anything about Megadeth in front of Mustaine

Did you know: Mustaine spent six months searching for Megadeth’s vocalist…before taking on the job himself