Sprunki Dead Rails is a free online zombie tower defense shooter where your job is simple: keep the train alive. Waves of zombies are coming, and you need to build block barriers, pick your weapons, and hold the line across 6 massive maps. Play solo or team up with a friend in two-player co-op mode right in your browser.

The game packs serious replayability. Choose from 4 weapons — pistol, PP, AK-47, and RPG — each with different range and damage for handling crowds or tanky undead. Save up to buy turrets that auto-fire so you can focus on building smarter defenses using 12 different block types. Customize your character with 15 Sprunki skins and switch between maps that each bring different layouts and zombie spawn patterns. Playing with a friend adds real strategy — one player builds while the other covers the flanks.

Sprunki Dead Rails is a great pick for fans of 2D zombie survival games, co-op shooter games, and browser-based tower defense. If you enjoy two-player zombie games online, Sprunki games, or mobile-style defense shooters you can play on PC without downloading anything, this one delivers. It works on mobile too, making it one of the best free zombie defense games you can jump into anywhere.