Guilty Gear XX #Reload
SP fighters
Beat an SP character while in survival mode. Hold L trigger when selecting that specific fighter to play as the SP version.
EX fighters
Beat an EX character while in survival mode. Hold White when selecting that fighter to play as the EX version. A
GGX and GGXX mode
Complete 70 missions.
Fight as Kliff
Complete 50 missions.
Fight as Justice
Complete 50 missions.
Fight against gold fighters
Highlight the "Arcade" or "M.O.M." mode, hold L while you select either mode.
Fight against EX fighters
Do the same as above except...hold White while selecting.
Fight against gold EX fighters
Same as above, except hold L + White while selecting.