Finish the game using only your knife (no lighter, Defensive Items, and stomping zombie heads).

Finish the game in five hours.

Finish the game with Jill and Chris.

Finish the game without saving anyone using Chris.

Defeat Lisa Trevor using Chris.

Defeat Plant 42 using Chris.

Finish the game on Easy difficulty or higher.

Finish the game on Very Easy difficulty or higher.

Finish the game using Jill.

Break into the laboratory using Jill.

Defeat a Crimson Head.

Defeat Black Tiger.

Obtain the Helmet Key using Jill.