| The shaft and floors | Runs descend floor by floor. Official badges mark floor 10, 25, 50, 100, and 500 milestones, and creator videos document themed biomes such as a Frozen Cavern and a Mineshaft along the way. | Official API + Creator videos |
| Combat | A first-person PvE shooter: click to shoot, Shift to sprint, R to reload, Ctrl to free the mouse (R2/L3/X on controller). Sprinting constantly and reloading between waves is the standard creator doctrine. | Official |
| Guns | Ten guns are documented by the community wiki, obtained via Scraps looted from chests, with damage, RPM, and magazine values per gun. The October 3 Into Oblivion badge confirms a mastery system that rewards the Oblivion skin at 10 mastered guns. | Community wiki + Official API |
| Enemies | Zombies come in 29–36 variants across three classes (Zombie, Gremlin, Brute), themed to eight biome palettes (Frozen, Fungal, Sunken, Charred, Withered, Drowned, Ossified, Crystalline), plus named specials like the Spitter, Mimic, and The Shrieker. | Community wiki |
| Bosses | Five named bosses — Gravemaw, Undergnaw, Rotmaul, Broodwidow, Ashwing — each with an official defeat badge, plus First Blood for your first boss kill and Every Last One for clearing the roster. | Official API |
| Loot and upgrades | “CRACK OPEN EPIC LOOT / STACK ALL UPGRADES” is official; chests during runs drop loot including the Scraps that buy guns. Upgrade names and stack values are not published in any source checked. | Official + Community wiki |
| Ranks | Official badges mark ranks 5, 10, 25, 50, and 100 (Repeat Offender through Hell's Own). How rank points are earned per run is not documented. | Official API |
| Daily rewards | The 7 Days in Hell badge (added August 14, 2026) confirms a seven-day daily-reward chain — log in and claim seven days in a row to complete it. | Official API |
| Saving | “Games now saves for all” is the current official line (re-checked November 10, 2026). It replaced the host-only rule on the October 8 publish — and “solo games save” before that. Save timing and persisted fields remain unpublished. | Official |