This Soundtrack/OST is composed by the tracks on the album S4 Vivace (The Official OST) and rips that some rippers and me had made. Thanks a lot to that rippers. Without them, any of this can't be carry out.
You can Download here http://forums.ffshrine.org/f72/s4-league-soundtrack-s4-league-vivace-rips-94226/
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Siege Mode is a soundtrack in S4 League. It is the default background music of Siege Mode