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Let Them Come: Onslaught official game artwork

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Let Them Come: Onslaught Wiki

Survive the relentless offensive of the alien horde in Let Them Come: Onslaught, a sci-fi survival roguelite. The pursuit of the perfect build and an ever-expanding arsenal of abilities are the keys to your suc

Steam ↗Windows
GameWiki EditorialReviewed 5 guide topics

GET YOUR BEARINGS

About Let Them Come: Onslaught

Let Them Come: Onslaught delivers a relentless roguelike alien assault with fast‑paced bullet‑hell combat and a retro 80s sci‑fi vibe. Players craft builds from a chaotic arsenal, upgrade weapons, and survive wave after wave of enemies across ever‑changing worlds.

The game features two playable characters, four distinct environments, and towering boss encounters, all set to an original synth‑wave soundtrack. Full controller, keyboard‑only, and mouse‑only options let you choose your preferred input method while Steam Cloud saves keep progress safe.

01 / THE GUIDE

Over‑the‑Top Weapon Arsenal

The game offers multiple weapons, from flamethrowers to Photon Sabers, each delivering a unique playstyle. Upgrades let you stack effects, creating combos that can clear crowds or focus precision fire.

Weapon choice shapes your build, letting you prioritize crowd‑clearing firepower, pinpoint accuracy, or defensive shields. The variety encourages experimentation to find the most satisfying and effective loadout.

  • Try pairing a high‑damage weapon with a shield upgrade for survivability.
  • Mix crowd‑clearing and precision weapons to handle varied enemy groups.

02 / THE GUIDE

Deep Roguelite Progression

Each run grants hard‑earned rewards that can be invested to unlock new skills and enhance existing ones. Build crafting between battles lets you refine strategies and push deeper into enemy territory.

The procedural nature ensures no two runs are identical, making experimentation with weapon synergies a core part of progression.

  • Focus on unlocking upgrades that complement your preferred weapon style.
  • Use each run to test a new combination before committing resources.
Let Them Come: Onslaught official gameplay screenshot
Publisher-provided gameplay image · Tuatara Games

03 / THE GUIDE

Wave Survival and Boss Battles

Alien waves intensify, testing reflexes and tactics. Surviving long enough triggers towering boss encounters that demand full mastery of your build and timing.

Boss fights serve as climactic tests, rewarding players who have honed their loadout and learned enemy patterns throughout the run.

  • Observe boss attack cues early to adjust your positioning.
  • Reserve high‑damage upgrades for the final boss phase.

04 / THE GUIDE

Four Distinct Worlds and Dynamic Maps

Players battle through four unique environments whose maps change each run. Dynamic elements like surprise mini‑bosses, distant supply drops, and random missions add variety.

These procedural maps keep each session fresh, requiring adaptation to new layouts and unexpected events.

  • Keep an eye on distant supply drops for extra loot.
  • Adapt your route when random missions appear to maximize rewards.

05 / THE GUIDE

Audio, Input Options, and Cloud Saves

An original synth‑wave soundtrack by Cartridge 87 drives the retro atmosphere. The game supports full controller, DualShock, DualSense, keyboard‑only, and mouse‑only inputs, letting players choose their preferred method.

Steam Cloud integration ensures progress is saved across sessions, and Steam Achievements provide extra goals.

  • Experiment with controller vs. mouse for aiming comfort.
  • Enable Steam Cloud to keep your builds safe across installations.

WATCH THE GAME

Let Them Come: Onslaught videos

Official trailers & gameplay

INSIDE THE WORLD

Screenshots & game images

5 official screenshots

IN THIS WIKI

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COMMUNITY

Player discussion

    QUICK ANSWERS

    Let Them Come: Onslaught FAQ

    How many playable characters are available?

    The game features two playable characters: The Soldier and The Psychic.

    Can I play using only a keyboard?

    Yes, a Keyboard Only Option is listed among the supported input methods.

    Does the game support saving progress across devices?

    Steam Cloud is included, allowing saved progress to be synchronized between installations.

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    SOURCES & CREDITS

    Official resources and further reading

    Original editorial guidance. Game imagery and trailers are provided by the publisher through Steam. Media and reference links checked 2026-10-24. Game versions, supported platforms, and balance can change; consult the linked release notes for current details.