What "Get Shiny" Is
Get Shiny is how the community refers to unlocking the Big Makeover achievement — one of the 12 Steam achievements, and among the rarest. In a hidden salon inside the tunnel system you'll find a palette of metallic colors (gold / silver / copper) and a brush. Paint yourself — or a friend — and the achievement pops.
Prerequisite: Yellow Lighthouse
First complete the Yellow Lighthouse in the northern part of the map (place the Red Totems there). That unlocks the underground tunnel system — there's one entrance by each big lighthouse, but the Blue Lighthouse entrance is the easiest to use. The Green Tower's chairlift can take you straight to the Yellow area if you've cleared it.
The Hidden Tunnel Route
From the Blue Lighthouse, go through its tunnel doors and grab the light source the game hands you (the tunnels are pitch black). Then:
- Head left toward the green pipe.
- Turn right, drop down, and go right again into the mixed-color tunnel.
- Go left into the green tunnels — don't fall.
- Cross the multi-color bridge as normal.
- Take the red zigzag downward into the secret location.
That secret room is where you Get Shiny: use the free metallic colors on yourself and your friends.
You Need a Friend to Paint You
Big Makeover is a co-op achievement — you need another player to paint you. The moment any part of your body turns metallic, the achievement triggers. Take turns so everyone in the group can earn it.
Rarity & 100%
Big Makeover is extremely rare (one tracking source cites roughly a 0.1% unlock rate — treat that as indicative, not official). It's not required to finish the story, but it is mandatory for 100% completion. Note: the Aug 7 patch 1.4.8 only raised near/mid-range voice volume and does not change this puzzle.
The Yellow Lighthouse prerequisite and the blue-pipe → red-zigzag → secret-salon route are confirmed across bigwalktips, Insider Gaming, ranzware and gamerhour. Exact wording differs between sources, but the spine (Yellow Lighthouse → Blue Lighthouse tunnel → metallic brush) is consistent. The ~0.1% figure comes from a single source — verify on Steam before quoting it as fact.