Octahedron achievements

Beat World 1

Begin your journey

Get all Par 100% Medals

Beat 4-7, collect and destroy nothing, don't get detected by a scanner, don't get hit

Collect all tetrahedrons

Get all Time Medals

In 3-1: Trap 4 enemies in the box-shaped area you start the level in

Get all trophies

After unlocking all optional upgrades, revisit 1-2 to get a Par Any% and a Par 100% Medal at the same time

Beat 1-6, collect and destroy nothing, don't get detected by a scanner, don't get hit

Beat the game in under 2 hours

Get all Deus Medals