VALORANT Corrode Guide: Callouts and 13.08 Changes

Three lanes, two sites
21 official callouts
Reworked in patch 13.08
Inspired by Mont-Saint-Michel

Sheet 1 / 1 · attackers ↓

Lane (Lobby → site)13.08 change, approximate area

VALORANT · Corrode

Rev. 13.08

Back in Competitive on 13 Oct 2026 with six changes. A French castle town turned Radianite salt mine; three lanes, two sites.

A Site · defender pathDefender path into the back of A Site adjusted
B Site · defender pathDefender path into the back of B Site adjusted
Mid half wallNow metal, and moved out 1 metre
Lower Mid boxesBoxes at the back of Lower Mid moved toward B, with a new jump-up
Lower Mid wallRaised
A plant zoneAdjusted

Since: Jun 2025
Callouts: 21
Lanes: 3
Pro atk*: 56%

Positions: the game's callout data via valorant-api.com, turned so attackers start at the bottom; lanes and zones are simplified, not walls. Changes: Riot's 13.08 notes; pins show roughly where each one is. *Masters Santiago 2026 (28 Feb – 15 Mar 2026), before 13.08 — vlr.gg.

Corrode is VALORANT's castle map: Riot calls it "a French castle town turned radianite salt mining facility" where you "siege your way through medieval streets" in "this traditional three lane map". It arrived in patch 11.00 in June 2025, left Competitive in March 2026 and came back in patch 13.08 on 13 October 2026 — rebuilt. Riot changed the defender paths into both sites, the Mid half wall, the boxes and wall in Lower Mid and the A plant zone. If you learned Corrode in 2025, some of what you know is now wrong. This guide shows every callout, each 13.08 change and what it means in a round, attack and defence plans, post-plants and the agents to start from.

Short answer: Corrode is a three-lane, two-site map that came back to the Competitive pool in patch 13.08 with six changes: faster defender paths into the back of A and B, a metal Mid half wall moved out one metre, Lower Mid boxes moved toward B with a new jump-up, a raised Lower Mid wall and an A plant zone that makes post-plants from A Link weaker. Expect quicker retakes, so attackers should plant for on-site cover and trade fast; defenders can afford to give space and retake. Start from a controller, an initiator with reveals and a sentinel for the flank.

Key takeaways

21 official callouts: eight on A, seven on B, four in Mid and the two spawns.
Retakes got faster — Riot shortened the defender paths into the back of both sites "to shorten rotations and help with retakes".
Mid changed most: a metal half wall one metre further out, boxes moved toward B with a jump-up, and a higher wall behind them.
A Link post-plants are weaker after Riot moved the A plant zone.
Old pro data predates the rework: at Masters Santiago 2026 Viper was on 86% of team-maps — useful, but from before 13.08.
New map, new grade: Map Rating launched in the same patch, so everyone's Corrode grade started from zero.

Corrode's story so far

Riot revealed Corrode at Masters Toronto on 22 June 2025 and released it two days later in patch 11.00, straight into Competitive and Deathmatch alongside Bind. Reference sites say it draws on Mont-Saint-Michel, the tidal island abbey in Normandy, and the map art shows it: a walled town, an industrial crane and a storm on the horizon. In 2026 it rotated out in patch 12.05 on 17 March and returned with the rework in 13.08. Patch 13.09 on 27 October changed no maps.

11.00 · 24 Jun 2025Released

Revealed at Masters Toronto two days earlier.

12.05 · 17 Mar 2026Rotated out

With Abyss; Lotus and Fracture came in.

Mar – Oct 2026Resting

Riot reworked it while out of rotation.

13.08 · 13 Oct 2026Back, rebuilt

Six changes; Ascent and Split left.

Every Corrode callout

The names below are the game's own. One translation matters: Riot's patch notes talk about Top Mid and Lower Mid, while the in-game callouts are Mid Top and Mid Bottom — the same places.

B — 7 callouts

B Arch
B Elbow
B Link
B Lobby
B Main
B Site
B Tower

Lobby and Main lead in from the attackers' side; Tower, Arch and Elbow are the back of the site.

Mid — 4 callouts

Mid Bottom
Mid Stairs
Mid Top
Mid Window

Bottom (Lower Mid) is the attackers' end, Window the defenders'. Stairs and Top sit between.

A — 8 callouts

A Crane
A Elbow
A Link
A Lobby
A Main
A Pocket
A Site
A Yard

Lobby, Main and Pocket lead in; Yard sits in front of the site, Link toward Mid; Crane is on the defenders' side.

Spawns

Attack spawn
Defence spawn

Attackers start at the bottom of our map, defenders at the top.

The lanes on the hero map are BoostPirate's simplification — Lobby to Main to site on each side and the Mid ladder from Bottom to Window — to show how the three lanes run, not every corridor. The callouts and comms guide covers how to call positions quickly on any map.

Every 13.08 change, and what it means

Riot's notes list six changes. Here is each one with Riot's reason, and BoostPirate's read on how it changes a round:

1A Site · defender pathDefender path into the back of A Site adjusted

Riot: shorten rotations and help with retakes.

What it means: Defenders who give up A early can come back faster. Attackers should expect a retake sooner and set up crossfires before the timer runs down.

2B Site · defender pathDefender path into the back of B Site adjusted

Riot: shorten rotations and help with retakes.

What it means: The same on B. A B hit that wins the opening fights still has to hold the site against a quicker retake.

3Mid half wallNow metal, and moved out 1 metre

Riot: less wall spam; attackers can sneak into A Link unseen from Top Mid.

What it means: Less ability spam over the wall and a quiet route into A Link — attackers can now take A Link without being seen from Mid Top.

4Lower Mid boxesBoxes at the back of Lower Mid moved toward B, with a new jump-up

Riot: new routes out of Lower Mid.

What it means: New angles out of Mid Bottom toward B and a new jump-up: Mid Bottom is a better place to start a B split from.

5Lower Mid wallRaised

Riot: stops peeks over it from the relocated boxes.

What it means: No more peeking over the Lower Mid wall from the moved boxes — the boxes are cover, not a perch.

6A plant zoneAdjusted

Riot: post-plant from A Link is less effective.

What it means: Planting so you can hold the Spike from A Link works less well. Plan A post-plants on site or from A's other entrances.

Corrode in patch 13.08 on 13 October 2026: 1 and 2, defender paths into the back of A Site and B Site adjusted to shorten rotations and help retakes; 3, the Mid half wall is now metal and moved out 1 metre, so attackers can sneak into A Link unseen from Top Mid; 4, boxes at the back of Lower Mid moved toward B with a new jump-up; 5, the Lower Mid wall raised; 6, the A plant zone adjusted so post-plants from A Link are less effective. Released in patch 11.00 on 24 June 2025, out in 12.05, back in 13.08 — **Corrode, revision 13.08.** All six changes in Riot's words, plus the map's history.Graphic: BoostPirate

Attacking on Corrode

Three lanes means three ways to start a round. After 13.08 the defenders come back faster, so the attacker's job is to win space early, trade quickly and plant where they can actually hold. BoostPirate's ranked plan:

DefaultMid first, then commit

Two players take Mid Bottom; the new boxes and jump-up give cover.
One shades A Main, one B Main for picks or info.
Call the site once Mid Top is cleared or smoked.

Execute · AMain + Link pinch

Smoke the back of A (Crane and Elbow side) where the new defender path arrives.
One player sneaks into A Link — the moved half wall hides them from Mid Top.
Main and Link enter together; plant for on-site cover, not for A Link.

Execute · BMain + Mid split

Smoke B Tower and Arch to cut the deep angles.
Main pushes while a player from Mid Bottom uses the new route toward B.
Leave one player to watch Mid for the faster rotate.

Post-plant on Corrode is the area 13.08 hit hardest. Riot moved the A plant zone specifically so post-plants from A Link are "less effective", so think about holding the Spike from on-site cover or from A's Main side instead. The attacking guide has the full execute-and-post-plant framework.

Defending on Corrode

The 13.08 changes were written for defenders: Riot wanted rotations shorter and retakes easier. That means you can play deeper and give a site up when the attackers commit, then take it back together through the new paths.

Setup · ATwo deep

One on site with cover, one watching Main and Pocket from the back.
Utility on A Link — attackers can now reach it unseen from Mid Top.
If the hit is big, fall back toward Crane and wait for help.

Setup · MidWindow, not Bottom

Hold Mid Window or Mid Top; don't hero-peek Mid Bottom's new boxes.
Call any B-side movement out of Mid — the jump-up is new.
Rotate early: the paths into both sites are shorter now.

Setup · BTower anchor

One on B Tower or Arch, one on site watching Main.
Slow B Main with a molly or trap.
Save utility for the retake: your path back is shorter than before.

For holds, stacks and retakes on any map, see the defending guide.

Agents for Corrode

Corrode wasn't in the pro pool at VALORANT Champions 2026, so the latest big-event data is VALORANT Masters Santiago 2026 (28 Feb – 15 Mar 2026), with 7 Corrode maps — before the 13.08 rework. Treat these as a starting point, not a verdict:

ViperController86%

OmenController71%

FadeInitiator71%

WaylayDuelist57%

NeonDuelist43%

VyseSentinel43%

YoruDuelist29%

AstraController29%

SkyeInitiator21%

SovaInitiator14%

IsoDuelist14%

ChamberSentinel7%

PhoenixDuelist7%

KAY/OInitiator7%

Vyse, VALORANT Sentinel, in a silver mask with violet metallic shapes swirling around her, official agent art — **Vyse** — 43% of team-maps on Corrode at Masters Santiago 2026.Image: Riot Games

Omen, VALORANT Controller, a hooded shadowy figure in a torn purple cloak holding a rifle, official agent art — **Omen** — 71%, often next to Viper (86%).Image: Riot Games

What 13.08 might change

Faster defender paths favour agents who retake well — flashes, reveals and smokes that can be placed from a distance. Sentinels like Vyse still matter for the flank, especially now that A Link can be reached quietly from Mid. BoostPirate's ranked starting point: one controller, one initiator with a reveal and one sentinel, plus two players who can take a fight.

Role guides: sentinel · controller · team comps.

Common Corrode mistakes

Expect a faster retake and set your crossfire early.
Use the moved Mid half wall to reach A Link quietly.
Start B splits from Mid Bottom's new boxes and jump-up.
Play A post-plants from on-site cover.
Relearn the map in a custom game before ranked.

Don't

Plant A for an A Link post-plant — 13.08 made it weaker.
Peek over the Lower Mid wall: it was raised.
Trust 2025 lineups and pre-aims without checking them.
Leave A Link unwatched on defence.
Treat pre-13.08 pro picks as the current meta.

A 15-minute Corrode refresher

4 minWalk the six changes
A custom game: find each numbered area from the hero map, then walk the new defender paths into A and B from the defender spawn.
3 minTest the Mid wall
Stand at Mid Top and check what you can still see of A Link; then try the jump-up by the moved boxes in Mid Bottom.
3 minFind two A plants
Pick two plant spots you can hold from on-site cover, since A Link post-plants got weaker.
5 minDeathmatch on Corrode
Corrode is back in Deathmatch too — learn the new angles without risking RR.

Your Map Rating for Corrode started from zero in 13.08 like everyone's, so it will tell you quickly which side to work on. More maps from the pool: Abyss, Bind, Haven and Lotus, or the full map pool guide.

Want the rework explained on your own replays? A coaching session covers Corrode's new paths with an Immortal+ coach, or queue with a Pro Teammate on your own account. Boosting is against Riot's terms — read is VALORANT boosting safe first.

Sources

Riot Games — Patch notes 13.08 (13 Oct 2026: Corrode and Bind in, the six Corrode changes, Map Rating) · 13.09 (27 Oct 2026: no map changes) · 12.05 (17 Mar 2026: Corrode out) · 11.00 (24 Jun 2025: Corrode released, three lanes, two sites) · VALORANT maps (Corrode description, read 8 Nov 2026)
Game data — valorant-api.com, Corrode (callout names and coordinates, read 8 Nov 2026)
vlr.gg — VALORANT Masters Santiago 2026 agent stats (28 Feb – 15 Mar 2026: maps played, attack and defence win rates, pick rates) · Champions 2026 (Corrode not in the event pool)
References — The Spike, Corrode map page (24 Jun 2025: Mont-Saint-Michel, reveal at Masters Toronto)
Checked 8 November 2026, on patch 13.09 (V26 Act VI). Maps rotate with new Acts — check the latest patch notes.

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FAQ

Common questions

What changed on Corrode in patch 13.08?

Riot shortened the defender paths into the back of A and B to speed up rotations and retakes, made the Mid half wall metal and moved it out one metre, moved the boxes at the back of Lower Mid toward B with a new jump-up, raised the Lower Mid wall and changed the A plant zone so post-plants from A Link are less effective. Patch 13.09 changed no maps, so that is still the layout you play.

Is Corrode in the VALORANT map pool?

Yes. Patch 13.08 on 13 October 2026 brought Corrode and Bind back into Competitive and Deathmatch, with Ascent and Split leaving. Corrode had been out since patch 12.05 in March 2026.

When was Corrode released?

Riot added Corrode in patch 11.00 on 24 June 2025, after revealing it at Masters Toronto on 22 June 2025. It is a three-lane, two-site map set in a French castle town turned Radianite salt mine.

What are the best agents for Corrode?

The last big event before Corrode left ranked, Masters Santiago 2026, had Viper on 86% of team-maps and Omen and Fade on 71%. That was before the 13.08 changes, so treat it as a starting point; BoostPirate's advice for ranked is a controller, an initiator with reveals and a sentinel who can hold a flank on either lane.

Is Corrode based on a real place?

Reference sites say Corrode draws on Mont-Saint-Michel, the tidal island abbey in Normandy, France. Riot's own map page calls it a French castle town turned Radianite salt mining facility.

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