If you're having a great time exploring the world of Big Walk, you'll have noticed some colorful tunnel entrances jutting out from the hills, which at first seem useless. These passages are key to avoiding getting lost climbing cliffs or trapped between rocks, allowing you to travel underground much more easily and directly.
To open these gates, you'll need to dedicate some time to completing one of the main towers. It's not an immediate path for everyone, as it depends on your priorities in the game, but once you achieve it, you'll unlock the Big Tunnel achievement and gain a massive tactical advantage for navigating the map more efficiently.
The path to the Yellow Tower
The key to this whole process is the Yellow Tower , located in the northern part of the map. While you can walk towards it from the start if you're up for a longer stroll, it's wiser to complete the Green Tower first. This way, you can take the cable car north , which will drop you practically next to the yellow tower, saving you a lot of time.
Harvesting the red pumpkins
To obtain the key to the tunnels, you need to collect five red pumpkins . These pieces are obtained by solving specific challenges. Once you have them, you must take them up and place them in the compartments located at the top of the tower. Here are the details of the puzzles you must solve:
- Delivery of symbols in an aerial chair: It requires coordination between two people. While one travels in the chair and views the correct symbols on a terminal, the other must find the board, display the appropriate symbol using the Q and E keys (or LB/RB on a controller) and, after confirmation, throw it onto the platform for the first player to fit it into.
- Blue concert stage buttons: One player must go up to the DJ area and observe a sequence of lights. They must signal which light is on (for example, by numbering them from left to right) by tapping on the glass, while their partner, located below, press the corresponding button on the console.
- Colored pegboard: It's a scavenger hunt where you have to locate 36 pegs. The green ones with a rock symbol are among boulders, the blue ones with a bridge are found in the orange perimeter structure, the yellow ones with a mushroom are under the vegetation, and the red ones with an arch are in the stage area and its pillars.
- The microphone challenge: One player must speak into several microphones at the back of the stage. The teammate, from their chair, must identify which one can be heard clearly And, once confirmed, the first person must press the bottom button of that specific microphone.
- The sound booth: It's about matching melodies. One player enters a back room with booths that emit sounds and must inform their partner outside, via intercom, which speakers to place in the empty booths to match the sounds. to match the melodies inland.
Final activation of the tunnel system
After placing all five pumpkins at the top, you'll receive a key. But be careful, simply having it isn't enough; you must carve the key into the base of the tower. You'll see a carving tool right in front of the entrance. Using it will cause a mark to appear at the top of the pillar, guiding you to the next tool. You must repeat this process five times in total, following the arrows.
Once the key is ready, head to the entrance of the yellow tunnel on the mountainside, near the black tower and the cable car. Inserting the key into the terminal will unlock all tunnel entrances on the map simultaneously. It's crucial that you pick up the flashlight you'll find on the ground before entering , as the interior is pitch black and you can't navigate without it.
Once inside, simply follow the signs to the colored tower you need. While the journey is still long, it's infinitely preferable to battling the steep terrain. We also recommend exploring every nook and cranny, as there are hidden secrets , such as a secret customization room where you can acquire shiny skins and unlock the Big Makeover trophy.
Unlocking the underground access involves conquering the Yellow Tower by solving five cooperative puzzles to obtain red pumpkins and carve the final key at five stations. This system not only grants you significant achievements but also transforms the game's navigation by allowing you to move between towers while avoiding surface hazards—just remember to bring your flashlight to avoid getting lost in the darkness.
