Killin can be acquired by playing through the first half of tournament mode; the 2nd character, Nemo, can be acquired by playing through the second half of tournament mode.
Real difficulty:
Beat all eight tournaments to unlock the Real difficulty.
Character concept art:
Unlock the following character's concept art by performing the corresponding tasks:
Adjo Concept Art - After finishing all 8 tournaments, complete any tournament as Adjo.
Dragov Concept Art - After finishing all 8 tournaments, complete any tournament as Dragov.
Finn Concept Art - After finishing all 8 tournaments, complete any tournament as Finn.
Killen Concept Art - After finishing all 8 tournaments, complete any tournament as Killen.
Kuro Concept Art - After finishing all 8 tournaments, complete any tournament as Kuro.
Nemo Concept Art - After finishing all 8 tournaments, complete any tournament as Nemo.
Renwick Concept Art - After finishing all 8 tournaments, complete any tournament as Renwick.
Seager Concept Art - After finishing all 8 tournaments, complete any tournament as Seager.
Character endings:
Unlock the following character's endings by finishing all 8 tournaments, and then completing any tournament with that same character:
Adjo Ending - After finishing all 8 tournaments, complete any tournament as Adjo.
Dragov Ending - After finishing all 8 tournaments, complete any tournament as Dragov.
Finn Ending - After finishing all 8 tournaments, complete any tournament as Finn.
Killen Ending - After finishing all 8 tournaments, complete any tournament as Killen.
Kuro Ending - After finishing all 8 tournaments, complete any tournament as Kuro.
Nemo Ending - After finishing all 8 tournaments, complete any tournament as Nemo.
Renwick Ending - After finishing all 8 tournaments, complete any tournament as Renwick.
Seager Ending - After finishing all 8 tournaments, complete any tournament as Seager.
Concept art:
Unlock the following concept art by performing the corresponding tasks:
Bunker Concept Art - Shoot all secret skullshots in all 6 bunker stages.
Manor House Concept Art - Shoot all secret skullshots in all 6 manor house stages.
Ocean Liner Concept Art - Shoot all secret skullshots in all 6 ocean liner stages.
Prison Cells Concept Art - Shoot all secret skullshots in all 6 prison cells stages.
Steel Mill Concept Art - Shoot all secret skullshots in all 6 steel mill stages.
Venice Concept Art - Shoot all secret skullshots in all 7 venice stages.
Warehouse Concept Art - Shoot all secret skullshots in all 6 warehouse stages.
Warzone Concept Art - Shoot all secret skullshots in all 6 warzone stages.
Unlockable levels:
Unlock the following levels by completing the corresponding tournaments:
Bunker - Complete manor house tournament.
Manor House - Complete warehouse tournament.
Ocean Liner - Complete prison cells tournament,
Prison Cells - Complete venice tournament.
Venice - Complete steel mill tournament.
Warehouse - Complete ocean liner tournament.
