Undertow Spillway

The weapons that shine most on Undertow Spillway are Tri-Slosher (Zones), Slosher (Clams) and S-BLAST '92 (Tower) (version 11.3). Stage advantages are estimated from stat.ink battle data.

Data through November 9, 2026

Set in an underground spillway. Your side is wide, but the center is extremely narrow, and the only way into the enemy side is through the center. Long-range weapons are strong because they can cover everything from your high ground, but short-range weapons still have a role around the ledges in the center. The big Ver. 7.2.0 rework widened the center, lowered the ledges, and added more cover and passages under the high ground, making it easier to move between left and right and to break holds.

Splat Zones

Zones tips

• There are two zones. Always hold at least one of them.
• Taking the right high ground makes it easier to stop the enemy from securing the zones.
• The center is narrow and tends to turn into a standoff, so hold the line and don't let yourselves get pushed in.

CTri-Slosher★Weapons that shine here+3.4
pt BNeo Sploosh-o-matic★Weapons that shine here+2.2
pt BCustom Blaster★Weapons that shine here+2.2
pt A.52 Gal★Weapons that shine here+2.1
pt BSplat Roller

Players say: The center path is narrow with lots of slopes, so path-blocking Rollers were brutal here (the Ver. 7.2.0 widening added escape routes and toned this down a bit).

★Weapons that shine here+2.0
pt SInkbrush Nouveau★Weapons that shine here+1.7
pt DCustom E-liter 4K ScopeWeapons that struggle here-2.5
pt DCustom E-liter 4KWeapons that struggle here-1.8
pt BExplosherWeapons that struggle here-1.5
pt BInkline Tri-StringerWeapons that struggle here-1.4
pt

Tower Control

Tower tips

• Unlike other modes, there's less footing on the center high ground, so the high ground is weaker here.
• The fight just before the second checkpoint decides the game. Support from above on the grate platforms.

BS-BLAST '92★Weapons that shine here+1.2
pt DCustom Jet Squelcher★Weapons that shine here+1.1
pt BSloshing Machine★Weapons that shine here+1.1
pt SOctobrush NouveauWeapons that struggle here-1.2
pt APainbrushWeapons that struggle here-1.1
pt ADapple DualiesWeapons that struggle here-1.0
pt

Clam Blitz

Clams tips

• The routes barely branch, so attacks all converge on the plaza in front of the basket.
• Take both the glass-floored high ground on the basket side and the enemy's high ground before you attack.
• Going under the enemy's high ground to reach the basket is the shortest route and relatively safe.

ASlosher★Weapons that shine here+1.5
pt SBlaster★Weapons that shine here+1.5
pt CBloblobber★Weapons that shine here+1.4
pt BSloshing Machine★Weapons that shine here+1.3
pt

Turf War

Turf tips

• Your side is wide, but the only way into the enemy side is through the center, so paint the center platforms to keep your path open.
• Your high ground is glass, so you can't lurk there. When defending, focus on dodging.
• If you push too deep into the enemy side, it's hard to get back, so don't chase too far.

SN-ZAP '89Weapons that struggle here-1.0
pt

Update changes

• Ver. 1.2.0: In Splat Zones, removed the boxes on top of the grates (to fix attacks from below slipping through the gap between the boxes and the terrain).
• Ver. 2.0.0 (2022/11/30): Terrain changed in Turf War only. Part of the terrain on the right side (as seen from your base) was removed and a slope to the enemy side was added. On roundup sites, players were split between 'less to paint, so it's easier' and 'isn't this just favoring Chargers?'
• Ver. 7.2.0 (2024/4/18): Major rework in all modes. The center was widened and the ledges lowered to make it easier to move between left and right, cover and passages under the high ground (tunnels) were added, and your high ground was expanded. Turf War, Splat Zones and Clam Blitz changed the most, while the Tower Control and Rainmaker routes didn't change much.
• Players took the rework as an attempt to ease Roller dominance in the narrow center and Charger lines of fire. Still, overseas players in 2026 say the backline still takes control easily and retaking the center is hard.