Night Swarm

Fubu Games' Night Swarm asks players to reclaim a stolen castle as a Vampire Lord, wrapping Vampire Survivors-style horde combat around a hub-and-node meta-progression structure several reviewers compare directly to Hades, all rendered in a distinctive art style where every character moves like a board-game piece propped on its own base. It launched as a full 1.0 release on 4 December 2025, and Steam's audience has responded with a genuinely mixed but net positive reaction -- Mostly Positive at 80% of 1,252 reviews -- reading across that corpus reveals a game with real, specific strengths sitting alongside two problems detailed and consistent enough to shape any purchase decision.

A genre hybrid with real visual identity

What sets Night Swarm apart from the crowded survivors-like field is immediately visible: every character, from the player's Vampire Lord to the smallest enemy, is rendered as a stylised tabletop miniature, standing on a small base even mid-combat. Reviewers describe this as a genuinely fresh visual hook, and pair it with a hub-and-node meta-progression system -- rebuilding and expanding the player's castle between runs -- that several detailed positive reviews compare favourably to Hades' structure, arguing it gives the genre's usual repeat-run loop more sense of forward momentum than most competitors manage. The soundtrack draws similarly consistent praise, with more than one reviewer specifically calling out a high-intensity track that kicks in when the player gets surrounded as a genuine highlight of extended sessions. Structurally, the game spreads its content across four distinct biomes, each with three maps and three difficulty tiers, and several positive reviews specifically praise how each biome introduces new enemy behaviours and hazards rather than simply reskinning the same encounters, at least across the opening stretch of the campaign.

A large, detailed and credible AI-content controversy

The most consequential recurring theme in Night Swarm's review corpus is a specific allegation: a large, heavily upvoted share of reviewers -- including one of the most-upvoted negative reviews on the entire page -- argues that the game's art, item descriptions, flavour text and dialogue are undisclosed AI-generated content. The claim isn't vague; reviewers point to specific supporting detail, including inconsistent quality between item icons, generically worded descriptions that don't match their items, and dialogue that reads as templated rather than authored. It's echoed independently across dozens of separate reviews, including from some reviewers who otherwise recommend the game, which is enough independent corroboration to treat as a credible, serious concern rather than an isolated complaint -- and one Steam's store page does not disclose at time of writing. Notably, several reviewers who still recommend Night Swarm explicitly separate the two issues in their own write-ups, describing solid, enjoyable moment-to- moment gameplay sitting uncomfortably alongside content they say they can tell wasn't made by a human hand, treating the two as genuinely independent judgements rather than one colouring the other.

Upgrades that don't change how you play

Layered on top of the content controversy is a specific, widely reported mechanical complaint: weapon and skill upgrades that several detailed reviews describe as making little tangible difference to how a build actually feels to play. More than one reviewer notes needing six or seven levels in a given upgrade path before it "feels" more powerful at all, with critical damage numbers failing to stand out visually even when they land. It's a complaint that recurs independently across reviews with widely different total playtime, from a few hours to over a hundred, suggesting it's a structural pacing issue rather than something that resolves with familiarity.

Difficulty tiers that reviewers say aren't worth the climb

Night Swarm ships with three difficulty tiers per map, and a specific, recurring complaint argues the gap between them is poorly tuned -- normal offers little real challenge, while harder tiers multiply enemy stats sharply enough that several reviewers describe them as tedious rather than meaningfully harder. Combined with reports of a post-launch economy change that increased resource costs and reduced drop rates, several long-session reviewers describe the endgame as a grind that exists mainly to pad achievement completion rather than reward genuine mastery. A smaller but specific thread of complaints adds practical friction on top of the balance concerns: several reviewers report noticeably small default text sizes and poor optimisation on Steam Deck, with one detailed negative review describing having to refund the game outright after being unable to read menus or adjust graphics settings to a playable frame rate on handheld hardware.

What the achievement curve suggests

Global achievement data supports the pattern described above. Early combat and collection milestones sit in the 80-97% range, consistent with a smooth, rewarding start that lines up with the genre-hybrid praise across the review corpus. Achievements tied to clearing every map across all three difficulty tiers, by contrast, fall to under 3%, and full completionist achievements sit under 2% -- a steep drop-off consistent with the specific complaint that harder difficulties offer little real incentive beyond a small, dedicated completionist minority.

Final verdict

Night Swarm pairs a genuinely distinctive visual identity and a smart meta-progression hook with two problems serious enough to weigh heavily against its Mostly Positive reception: a large, detailed and independently corroborated allegation of undisclosed AI-generated content, and a progression system that a wide share of its own audience says thins out considerably once the opening hours end. At a discounted price, there's a genuinely fun few hours here for players willing to set the content concerns aside -- but both issues are specific and recurring enough across the review corpus to warrant real caution before buying in at full price.