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