The last 3 Gallery Pictures

Unlockable:                       How to Unlock:
Gallery Picture 31 "Earth Side"   Complete all Missions (Earth Side+Bydo),
                                  and then get 20 "Mission clear" 
                                  by completing 20 Missions again 
                                  (it doesn't matter which Mission)
                                  
Gallery Picture 30 "Last Dancer"  Complete all Missions (Earth Side+Bydo),
                                  and then get 10 "Mission clear" 
                                  by completing 10 Missions again 
                                  (it doesn't matter which Missions)
                                  
Gallery Picture 32 "Bydo Side"    Complete all Missions (Earth Side+Bydo),
                                  and then get 30 "Mission clear" 
                                  by completing 30 Missions again 
                                  (it doesn't matter which Mission)