Complete all six chapters in Part 1

As host, complete a rescue mission for all four locations in Part 2

Rescue Hardboiled Chicken for Part 2 in the game

Find all 18 signs in all 6 chapters in Part 1

Find 9 signs in any three chapters in Part 1

Find all 3 signs of a single chapter in Part 1

Kill all enemies during Hardboiled's final, successful escape in Chapter 6

Drop six Space Owls into the liquid ooze in Chapter 6

Defeat the swinging hexapod, once you see its health bar, in under 30 seconds in Chapter 5

Stand on the Hexapod's Nose while it is firing its missiles in Chapter 4

Detonate a bomb near either G-man in the final show-down in Chapter 2

Make enemies kill 15 co-workers in Chapter 2

Melee kill 15 Enemies in a row without triggering the alarm in Chapter 2

Headshot kill 15 enemies in a row in Chapter 1

Get someone to tell you what's up ahead in Chapter 1

Make Putzki shoot himself in Chapter 1

Unlock 100 costume items or weapons in Part 2

Attain 3 star scores for all four locations in Part 2

Attain a 80% or higher accuracy score on a mission in Part 2

As host, collect all nine artifacts in Part 2

Unlock all 4 hostages in the UFO in Part 2

Unlock all 4 hostages in Jungliana in Part 2

Unlock all 4 hostages in Putzki's Pork Plant in Part 2

Unlock all 4 hostages in Putzki's Castle in Part 2

Spend more than 50,000 bucks in Part 2

Headshot kill 100 enemies in the game

Melee weapon kill 100 Enemies in the game

Kill 4 Enemies with a single grenade shot in the game