Here is the full list of all 17 Tiki Galore achievements.
Kill Your First Tiki
Use a Total of 50 Tiki Specials
Collect a Total of 500 Shrunken Heads
Spend 2 hours & 1 second on Galore Island
Use each Tiki Special
Kill 3 Tikis with 1 Stamina Special
Hit 20 Tikis with Deflected Spears while Health Special is Active
Kill 3 Tikis with 3 Homing Spears in a single match
Kill at least 2 Tikis with 1 Coco Spear Special
Cause 6,969 Damage with Fire Spears
Snare 20 Tikis with Tangle Traps
Kill 3 Tikis with the same Spike Trap
Kill 50 Tikis in 1 Match
Kill 2 Tikis with 1 Spring Trap
Super Jump to highest point inside Volcano
Taunt your Kills 100 times
Use Invisibility to Get 3 Kills 3 times