[Network] A player joined your room.

[Network] Leveled up to level 11.

[Highlander Assault] Completed the Highlander Assault Mode.

[Score Attack] Completed 1 course.

[Abyss] Completed up to Stage 6.

[Challenge] Completed 50% of all challenges.

[Tutorial] Finished the stylish and beginner lessons in Tutorial Mode.

Get a Platinum medal

Finish the game with any ending

Complete a level by only shooting Barrels

Kill 5 other Zombies by shooting a Taser Zombie

Get all upgrades in all categories