Killswitch Engage's music has always been very melodic. YouTuber Sean Townsend has not only recognized that, but has reimagined all those melodies and harmonies for one hour of solo piano based entirely off the band's works. Check out the full "album" below, which I strongly suggest you do, and skip around a bit courtesy of the track list with timestamps.
00:00 – My Curse
04:42 – Take This Oath
08:50 – The End of Heartache
14:42 – When Darkness Falls
18:42 – The Element of One
23:05 – Rose of Sharyn
26:50 – My Last Serenade
30:08 – Reject Yourself
35:38 – The Arms of Sorrow
41:04 – This Fire Burns
46:22 – And Embers Rise
51:26 – Always