Clear world 1, The Forest.

Clear world 2, The Workshops

Clear world 3, The Fortesque Mansion

Destroy the Chaos Engine

Destroy the Chaos Engine with 2 players alive

Collect 10000 money in a single play through

Use 50 Specials from your inventory

Kill 500 enemies in a single play through

Fully upgrade the Brigand character

Fully upgrade the Gentleman character

Fully upgrade the Thug character

Fully upgrade the Mercenary character

Fully upgrade the Navvie character

Fully upgrade the Scientist character

Use the Molotov Special from your inventory 50 times

Use the Shotburst Special from your inventory 50 times

Use the Ground Mine Special from your inventory 50 times

Use the Bomb Special from your inventory 50 times

Use the Dynamite Special from your inventory 50 times

Use the Freeze Monster Special from your inventory 50 times

Use the Distract Monster Special from your inventory 50 times

Kill 20 enemies in a single run without losing any health

Use a first-aid kit 50 times

Fully upgrade a single statistic for any character

Find 28 gold keys in a single run

Complete the campaign in a single run

Die 100 times

Resurrect 10x dead characters in co-op games

Complete single-player campaign playing as all six characters

Kill 500 Frogs

Kill your first enemy

Collect 50000 money