Mystery Box Room

• Shoot ten lanterns around the map. When a lantern is shot correctly, it will very faintly light up purple and a raven's caw sound will play. Lantern Locations:

Downstairs

1. Hanging at the bottom of the stairs, left of the MP-40 wallbuy
2. Outside the window left of the MP-40 wallbuy, on the hood of a truck
3. Hanging on the support column in the middle of the room, right of the MP-40 wallbuy
4. At the bottom of the stairs in the Kitchen
5. Above the table in the Kitchen
6. Outside the window in the Kitchen, on the metal cart, left of the stack of wood

Upstairs

7. Hanging above the top of the stairs closest to the MP-40 wallbuy
8. Across from the Random Blitz machine
9. On a chair, left of the Combat Shotgun wallbuy
10. On the desk, across from the Combat Shotgun wallbuy

Pack-A-Punched Weapons from Mystery Box

1. Obtain Jack-In-The-Boxes from the Mystery Box.
2. Throw a Jack-In-The-Box at the metal square on top of a beam above the staircase near the Blitz machine. Once the Jack-in-the-Box blows up, the metal square should be gone.
3. Give the piano next to the Mystery Box room 10,000 Jolts.
4. All weapons from the Mystery Box will be Pack-A-Punched.

Unlockable Characters

Characters can be unlocked through the completion of various challenges. Your progress can be checked on the Lobby Menu → Soldier → Dossier → Challenges.

Bloodraven Mountaineer (Home Ward) --- Character Model

Challenge Hint Text / Riddle	Challenge	Strategy / Notes
And stay out!	Survive 30 waves without going down.	Unlock the Pack-a-Punched Mystery Box.
Tag world champion.	Survive 20 waves without getting hit.	Co-op recommended. At the beginning of the match, you can camp at the Combat Shotgun wallbuy. If another player gets hit, you can still complete the challenge. You have to reach wave 20 without getting hit, not complete any 20 waves without getting hit.
If you can't take the heat...	Kill the Brenner that spawns on Wave 50.	Unlock the Pack-a-Punched Mystery Box.

Rookbane (Level 1000 Reward) --- Character Model

Challenge	Strategy / Notes
Reach Level 1000 in the Zombie Mode	See this post (reddit) for some XP farming strategies.