
Radio Towers in Easy Delivery Co. are the reason your map stops opening up. They are not optional scenery and they are not a side collectible — activating them is how you unlock the EasyCo security gate that stands between you and the Fishing Town. If a later route feels blocked for no obvious reason, a missing tower is almost always the cause.
Radio Towers are a progression gate, not a bonus landmark. Activating the three required towers — Upton, Easton, and Lopton — opens the EasyCo security gate at the Fishing Town entrance. You will still reach the Fishing Town tunnel under your own power, but the locked gate inside only opens once those three towers are live.
That changes how you should prioritize them. If you treat the towers as cleanup for later, you will burn time on deliveries while wondering why the next region refuses to open. Treat them as a mid-route milestone instead: earn enough from jobs to upgrade your vehicle, activate Upton, Easton, and Lopton as the map expands, then push the gate at Fishing Town.
There are four towers, and three of them are required to break into Fishing Town. The fourth, Smalton, is inside Fishing Town and is only reachable after the gate is open.

One of the two mountain-town towers, found to the right of Easton on the main route. This is the most straightforward of the four — scan the infrastructure on the right side of Easton as the road opens and you will spot it without a detour.
The second mountain-town tower sits above Upton. “Above” is literal: anchor on Upton and search the higher route or the northern side of that area rather than overthinking a hidden quest chain. There is no puzzle here — just elevation.
This is the demanding one. The Lopton tower sits on the snowy upper terrain above the road on a hillside, and the route up is treacherous. Snow tires make the climb manageable rather than miserable, and you also need a lighter or another warmth source so you do not freeze on the ascent. If the slope feels impossible, that is the game telling you to prep, not a sign you are off-route. Snowy Peaks and Lopton are the same region — different guides label it differently, but it is one tower.
The fourth tower is inside Fishing Town itself, in the Smalton area. You cannot reach it until the three required towers have opened the EasyCo gate, so it is naturally the last one you visit. It is the tower most location lists leave out, which is why “three vs four” confusion is so common — the story only forces three, but all four exist and all four count toward the Radio Towers achievement.
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Four. The confusion comes from the achievement framing: the story only forces you to activate three towers (Upton, Easton, Lopton) to open the Fishing Town gate, so short location summaries often list only those three. But there is a fourth tower in Smalton (Fishing Town), and all four are required for the Radio Towers achievement. If you have cleared Easton, Upton, and Lopton and your completion still looks short, the missing one is Smalton inside Fishing Town — not a bug.

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For a wider view of how the towns connect, see the map guide to every town and main route. The towers sit inside the game’s economy: take jobs, upgrade the vehicle, then use those upgrades to reach the demanding climbs.
Do not postpone the Radio Towers. Activate Easton, Upton, and Lopton during the early-to-mid game — buying snow tires and packing a warmth source before the Lopton climb — to open the EasyCo security gate at Fishing Town. Once inside, grab the fourth tower at Smalton if you are chasing the achievement. If a later town or route feels blocked, the fix is almost never a hidden quest step. It is a tower you have not switched on yet. From here, the radio tower progression and hydro dam guide covers what opens up next, and the full walkthrough and all-endings guide ties the route together end to end.