What are the documented in-game secrets in Roblox Arsenal and where is the basement referenced?

1. What the community means by “secrets” in Arsenal

Players and fan resources define Arsenal secrets broadly: concealed rooms, images, hidden text, audio files, objects, or transient glitches that act like easter eggs, some of which have been removed over time and others that persist as collectible curiosities for explorers ^[1]. Community pages collect notes such as numbered “Day” messages, meme references, developer gravestones, and odd UI prompts (for instance a bottom‑right menu number that hints at meaning when hovered) — details that the official developer documentation does not centrally enumerate but that players archive in fandom repositories ^{[3] [1]}.

2. Mighty Manor: the map with the basement and the most secrets

Mighty Manor is singled out by fans as Arsenal’s most secret‑dense map, intentionally packed with references and memes, and explicitly contains a basement area described as “essentially a ghost town,” making it the principal in‑game basement referenced in community guides ^[2]. The manor’s three stories plus kitchen, attic and helipad are noted in map writeups, but it’s the basement and its associated hidden content — gravestones, references to developers, and the so‑called “mightybaseplate creature” — that players repeatedly cite when asking “where’s the basement?” ^{[2] [3]}.

3. Glacier, campfires and the frozen tix bag route to secret rooms

Another recurring secret route involves the winter/glacier areas: community documentation explains that breaking through a frozen Tix bag in a glacier — by shooting or melee — can spawn access to a hidden room in which players encounter map‑author avatars gathered around a campfire and secret messages, a shrine‑style encounter preserved in fandom notes ^{[3] [4]}. NamuWiki and the Arsenal fandom both record that these glacier/campfire spaces contain messages and static scenes, though the specifics of interaction (mobility, physics bugs) vary by report and patch history ^[4].

4. Map‑to‑map secret links: Tuscan, April Fool maps and event routes

Some secrets act as portals to entirely different curated maps or event content; for example, community sources report that a secret passage in Tuscan can lead to a distinct map that rewards players (such as an April Fool’s or special map) and that completing such hidden maps can yield cosmetic or event items — documentation that emerges from player discovery rather than a single official list ^[4]. Event guides likewise point out hidden entrances and event‑only collectibles (like Tix) in specific scenarios — another class of secrets tied to temporal events rather than permanent map geometry ^{[5] [6]}.

5. Quests, puzzles and developer‑created secrets beyond physical basements

Later content adds scripted puzzles and quest‑gated secret areas: The Hunt quest and Mega Edition content include valve‑matching, locker searches and mechanism assembly that unlock secret areas and rewards, demonstrating that not all “secrets” are cosmetic or static — some are formalized gameplay unlocks tied to event mechanics ^[7]. Guides and wikis are the primary recorders of these mechanics because developer communication is fragmented; consequently, community archives are the best available map of secrets and their access steps ^{[7] [1]}.

6. Limits of the record and the need for community corroboration

The assembled record is heavily reliant on fandom pages, fan guides and foreign wiki translations that sometimes note deletions or controversies (for instance, map removals tied to developer misconduct), meaning some secrets may be patched out, renamed, or absent from official changelogs; the available sources do not provide a single canonical developer list, so verification often requires in‑game testing or cross‑checking multiple community entries ^{[4] [1]}. Where sources are silent about a claimed secret, this analysis refrains from asserting its existence or absence.