Undead Onslaught

Dark fantasy bullet-heaven roguelike with villains and escalating waves

Wish App Games · Released Jun 22, 2024 · Early Access

Reviews: Very Positive; 82% of 72
Recent reviews: Not enough recent
Playing now: 0; right now
Steam Deck: Playable
Last update: 8 months ago; Jan 12, 2026

What is Undead Onslaught?

This single-player, 2D bullet-heaven roguelike casts you as a villain fighting the forces of light. Choose a character, use weapons and magic to survive escalating enemy waves, and develop abilities over repeated runs. After a defeat, a champion appears in the next run; defeating them grants you power.

For you if...

+you like fast-paced combat against increasingly strong waves
+you enjoy experimenting with different character skills and builds
+you prefer dark fantasy settings and villain protagonists

Not for you if...

−you dislike repeating runs after defeat
−you want multiplayer instead of solo runs
−you prefer to wait until Early Access ends

What players say

82% of 72 reviews are positive

Players praise the distinct characters, varied skills, and character progression.

Screenshots and trailer

Undead Onslaught system requirements

As published by the developer.

Minimum

OS: Requires a 64-bit processor and operating system OS *: Windows 7 (64 bit)
Processor: Intel Core i3-3210
Graphics: DirectX 10 capable GPU
Memory: 4 GB RAM
Storage: 3 GB available space

PC version details

DRM, required accounts, controller support and Steam features.

DRM: None declared on Steam
Controller: Full controller support
Platforms: Windows, macOS, Linux
Achievements: 75
Steam features: Cloud saves, Family Sharing

Steam Deck: Playable

Some in-game text is small and may be hard to read
All functionality is accessible with the default controller configuration
Shows Steam Deck controller icons
Default graphics settings perform well on Steam Deck

Multiplayer and co-op

Single-player

Languages

Text only: English, German, Russian, Japanese, Simplified Chinese, Traditional Chinese, Dutch, Korean, French, Spanish - Spain, Polish, Portuguese - Brazil, Portuguese - Portugal, Spanish - Latin America, Ukrainian.