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