Let Them Come: Onslaught brings retro bullet-heaven chaos to Xbox

Table of Content

Let Them Come: Onslaught arrives as a retro-styled sci-fi bullet heaven focused on fast runs, heavy buildcraft, and screen-filling hordes. The game launches on November 11, 2025 for Xbox Series X|S and Xbox One. Each attempt asks players to curate a loadout from a wide pool of weapons and upgrades, then survive while the arena grows more hostile. The alien planet itself is a threat – hazards can be avoided or weaponized to thin the herd. Below are the key mechanics and tips outlined by the developers to help players stay alive longer and scale damage efficiently.

Release details and core premise

Onslaught positions itself in the “bullet heaven” corner of the action roguelite space, with runs that lean on high, scaling damage output, layered defenses, and survival movement. The loop blends moment-to-moment positioning with between-run progression via the Armory, where offensive options can be upgraded for future attempts.

Survival fundamentals: offense first, but live to tell the tale

• Damage scaling is critical – keep increasing output throughout a run to prevent being overrun. Between runs, invest in Armory upgrades to keep pace.
• Layer defenses smartly – the level-up Shield absorbs one hit and recharges on cooldown. Pairing Shield + Health Regen + Armor Plating can markedly extend survivability.
• Use invincibility frames (“i-frames”) – you gain brief invulnerability after taking a hit, when a Super Shield ends, or after using the Soldier’s dash. Learn the duration to squeeze through packs and reposition.
• Chain dashes – multiple charges can be fired in succession, letting you remain untouchable while cutting through dense swarms.
• Hazard awareness – environmental threats can be avoided or turned against enemies, creating breathing room when swarmed.

Health and economy: how to recover and fund your build

• Health packs – can drop from mini bosses but are most reliably found in common crates. Explore and break crates to stabilize health over time.
• Emergency heal – a level-up option to increase Max HP by 150 also heals you by the same amount, making it a last-ditch survival choice.
• Credit farming – credits primarily sit in common crates and mission rewards. The Armory’s Extermination Contract can add random credit drops from mini bosses.
• Bonus wave and multipliers – defeating a level’s main boss triggers a bonus enemy wave that drops credits. Completing a level adds a credit multiplier, and Hard Mode grants an additional multiplier.

Missions vs. supply drops: choosing on the fly

When both appear simultaneously, weigh the information at hand. Missions display their reward in the upper-right UI and often show distance to target. If time is running out and the mission is too far, pivot to the supply drop, which is faster to access but has an unknown reward until opened.

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Weapons and upgrades: roles, synergies, and power spikes

Weapons fill different niches: some excel at crowd control and pushback, others deliver targeted damage or wide-area bursts. The key is to mix roles so your build clears screens while still melting priority targets.

• Level 3 is a turning point – many tools unlock major perks at Level 3: Shotgun gains Double Shot, Electric Grenades fire in batches of two, and the Flamethrower applies burning. Builds with too many sub-Level-3 weapons may stall out.
• Shotgun vs. Repulse – both push enemies back. Repulse pushes in all directions but deals less damage; Shotgun hits harder and cripples enemies by reducing their movement speed. Running both improves survival but can compromise boss damage.
• Autogun vs. Blaster – both auto-aim at the nearest target with low cooldowns. Blaster ramps up fire rate while standing still, underwhelming at low levels but strong for sustained boss DPS when upgraded.
• Electric Grenades vs. Rocket Barrage – both deliver heavy, random-area damage. Grenades detonate closer to the player, while rockets strike further out. Combining both spikes damage but leans on RNG to hit priority enemies.

Platform and date

Release date: November 11, 2025. Platforms: Xbox Series X|S and Xbox One.

Final Takeaway – Why it matters

Onslaught emphasizes build decisions under pressure: stack damage, layer defenses, and learn i-frame windows to survive escalating waves. Players who master Level-3 spikes and economy play – from crate routing to mission choices – will find the tools they need to push deeper, one calculated upgrade at a time.