Note: This game is also titled Gun Survivor 2: Biohazard.
 
 
 Secret Report
 Collect all the messages in each level to unlock the Secret Report.
 
 
 Vs. Roach mode
 Successfully complete the first mission in dungeon mode to unlock 
 Vs. Roach mode.
 
 
 Panzerfaust EX
 Successfully complete the game in Vs. Roach mode to unlock the Panzerfaust 
 EX in Vs. Roach Mode with infinite ammunition.
  
 
 Chris Redfield
 Successfully complete Inferno mission 6 to unlock Chris Redfield 
 with a Linear Launcher with infinite ammunition in dungeon mode.
 
 
 Better partner
 Successfully complete the game to raise your partner level to 4 
 in arcade mode. Complete the game a second time to raise your partner 
 level to 8 in arcade mode.
 

 Rodrigo
 Successfully complete all the dungeon missions, including Inferno mission 7, to
 unlock Rodrigo with only a combat knife in dungeon mode.