Practice in TRAINING. What's important for a sumo is daily training... Head-to-head training that is!

Purchase all skills in one category.

Collect 25% of all relics.

Collect 5000 pieces of salvage.

Kill 40 enemies with the shotgun.

Complete one optional tomb.

Kill 50 enemies with the bow.

Perform 50 headshot kills in the single player campaign.

Completed "The Man with the Guardian Spirit".

Cleared the Colossal Canopy of its pest problem.

While in the air, perform four actions before touching the ground.

Kill an enemy with an exploding barrel.

Finish Act 3