To get bonuses, you have to complete the following tasks:
Chapter 1 - Completion Award: complete Chapter 1
Chapter 2 - Completion Award: complete Chapter 2
Chapter 3 - Completion Award: complete Chapter 3
Chapter 4 - Completion Award: complete Chapter 4
Chapter 5 - Completion Award: complete Chapter 5
Chapter 6 - Completion Award: complete Chapter 6
Chapter 7 - Completion Award: complete Chapter 7
Chapter 8 - Completion Award: complete Chapter 8
Chapter 9 - Completion Award: complete Chapter 9
Gold Game Completion: complete the game
Bronze Melee Master: complete a chapter only with melee weapons
Chapter 1 - Bronze Bird Award: Find 1 Bird in Chapter 1
Chapter 2 - Bronze Bird Award: Find 1 Bird in Chapter 2
Chapter 3 - Bronze Bird Award: Find 1 Bird in Chapter 3
Chapter 4 - Bronze Bird Award: Find 1 Bird in Chapter 4
Chapter 5 - Bronze Bird Award: Find 1 Bird in Chapter 5
Chapter 6 - Bronze Bird Award: Find 1 Bird in Chapter 6
Chapter 7 - Bronze Bird Award: Find 1 Bird in Chapter 7
Chapter 8 - Bronze Bird Award: Find 1 Bird in Chapter 8
Chapter 9 - Bronze Bird Award: Find 1 Bird in Chapter 9
Chapter 1 - Silver Bird Award: Find 6 Birds in Chapter 1
Chapter 2 - Silver Bird Award: Find 6 Birds in Chapter 2
Chapter 3 - Silver Bird Award: Find 6 Birds in Chapter 3
Chapter 4 - Silver Bird Award: Find 6 Birds in Chapter 4
Chapter 5 - Silver Bird Award: Find all 6 Birds in Chapter 5
Chapter 6 - Silver Bird Award: Find 6 Birds in Chapter 6
Chapter 7 - Silver Bird Award: Find 6 Birds in Chapter 7
Chapter 8 - Silver Bird Award: Find 6 birds in Chapter 8
Chapter 9 - Bronze Bird Award: Find 6 birds in Chapter 9
Golden Bird Award: Find all birds in the game
Propaganda Report 1: Find 9 Metal pieces
Propaganda Report 2: Find 20 Metal pieces
Propaganda Report 3: Find 29 Metal pieces
Propaganda Report 4: Find 30 Metal pieces
Internal Affairs Report: Find 20 Metal pieces