Here is the full list of all 25 1001 Spikes achievements.
Find the Key of Serpentis
Complete every stage of the main game as Aban Hawkins with a cumulative time of less than 30 minutes
Complete the Lost Levels
Purchase Cutscene Theatre
Purchased Red Armor Cosplay Costume
Purchased Asano Armor Cosplay Costume
Purchased Tattered Gi Cosplay Costume
Collect all golden skulls
Unlocked Curly Brace
Unlocked Nyx
Unlocked El Testigo
Complete the Golden Temple
Unlocked Tina Hawkins
Purchased Tactical Gear Cosplay Costume
Unlocked Zombie
Unlocked President Thompson
Unlocked Juni
Unlocked Sugimoto
Unlocked Commander Video
Complete Antarctica
Complete the Tower of Nannar
Unlock every character and costume
Purchased Ninja Gi Cosplay Costume
Purchased Thompsoncare
Unlocked Jim Hawkins