What Blue Tower Unlocks
Blue Tower is the fourth and final stop on the recommended route. Clearing it opens the Monorail — but the same community guide calls the monorail slow and infrequent ("pretty unhelpful"), so it's the lowest-value unlock and best saved for last once you already have the map, chairlift and tunnels. It grants the Big Ride achievement.
The Five Blorb Puzzles
Blue Tower's five blorb puzzles are the hardest of the four towers and lean on memory and gesture — speech is increasingly taken away, so you signal by hand. The verified shape:
- Blorb 1 — a memory puzzle (watch, then reproduce).
- Blorb 2 — a gesture relay with no speech.
- Blorb 3 — combine memory + stacking.
- Blorb 4 — a longer silent build.
- Blorb 5 — gates the monorail.
Co-Op Mechanic: Memory & Gesture
Blue Tower is where Big Walk strips away voice. Pre-agree a gesture vocabulary (point, stack, nod, show count on fingers) before you start, because you'll need it cold. The laser pointer is your friend for "over there."
Difficulty & Time
Blue Tower is the hardest tower and the longest single session — budget 45–70 minutes for the five blorbs if speech is blocked for most of it.
Co-Op Tips
- Agree gestures before the silent puzzles; improvising them mid-puzzle wastes attempts.
- The monorail is slow — use your tunnels/chairlift for anything time-sensitive instead.
- Take the monorail at least once to bank the Big Ride achievement, then ignore it.
What Comes After Blue
All four towers done means the endgame opens: the Black Obelisk → wall → Black Sphere, then the no-communication finale. The post-game seven purple challenges (for the 100% ending) wait in the east-ridge area reachable via Green's chairlift — see Purple Challenges or the Puzzle Index.
Blue Tower's per-blorb steps are community-documented from 100% walkthrough videos; this page reflects the verified structure (unlock, mechanic, difficulty). Corrections welcome via the contact page.