Neon Abyss 2 is a run 'n' gun roguelike developed by Veewo Games and published by Kepler Ghost. You descend into the Neon Abyss beneath New Athens, shooting everything that moves and stacking item combinations you could never plan for — the Steam store page advertises no limit on carried items. The game supports online co-op for up to four players and full controller support, including DualSense and DualShock.
Controls (Keyboard & Mouse / Controller)
All bindings are remappable in the settings menu. The game uses twin-stick-style aiming: movement and fire direction are independent, so strafing while sweeping the room with bullets is the default way to fight.
| Action | Notes |
|---|---|
| Move / Jump | Platforming basics; some items unlock double or triple jumps |
| Aim + Shoot | Twin-stick style — run one way, shoot another |
| Interact | Pick up items, open chests and doors, talk to NPCs; hold Interact next to a weapon to Vaporize it into Soul Crystals |
| Use Curio | Purple active item, usually costs Crystals to cast; each Agent carries one |
| Place Bomb | Blasts rocks and hidden-room walls; also usable in combat |
| Reload / Swap Weapon | Swaps freely; Badge and Artifact buffs carry over automatically, so you never lose effects by switching |
Controller players get two presets — single-stick and twin-stick. Veterans of the first game can load the twin-stick preset and enable right-stick firing to reproduce the classic dual-stick feel.
Warning: there is no built-in dodge roll. Movement tools such as rolls and teleports come from Curios (the Yarn Ball, Wave-Particle Duality, and similar items), and the whole movement is invulnerable — this is your primary answer to bullet patterns at higher difficulties. Also note that after win streaks, hit invulnerability shrinks even further within the same difficulty, so never treat the 1-second window as a fixed rhythm.
Post-hit invulnerability (i-frames) by difficulty: Easy 3.5s, Normal 2s, Hard 1.5s, Abyssal 1s.
The Core Loop: Bar to Abyss Floor
A run covers up to 8 floors. Each floor follows a fixed rhythm: prep at the bar, clear the floor's rooms, kill the Boss, take the elevator down.
Prep: The Bar Checklist
Before dropping in, work through the bar in this order:
- Pick your Agent. Nik is available from the start; every other Agent unlocks through their own task chain. Each has a signature starting weapon and passive keepsake.
- Check the Targets board. The large triangular screen in the bar lists every Boss and its unlock condition — it doubles as the game's built-in progression roadmap. Decide who you are hunting this run.
- Set the difficulty. Switchable at any time; see Difficulty Tiers below.
- Test weapons in the Training Room. Added in the January 2026 Glimmer Heist update, located downstairs from the bar. Test any unlocked weapon against static, moving, and multi-target dummies — far cheaper than fumbling a swap mid-run.
The Four-Step Floor
- Clear combat rooms. Enemies drop almost no coins; coins come from room-clear rewards. Clear every room clean before moving to the next door.
- Sweep the special rooms. Floors 1–4 always contain an item room and a shop, plus challenge rooms and mixed rooms, all attached at the far ends of the map. Walk to the end of every branch.
- Kill the Boss. The Targets are mechanical behemoths. Boss kills award Soul Crystals and Evolution Points; take the portal down.
- Floor transition. On descending, your Faith gauge resets and your first Faith swap becomes free again (only at the new floor's first Faith Pillar). Everything from the previous floor converts into your inventory — spend your coins and open your chests before you leave.
Special Room Slots, Floors 1–4
Special rooms are not fully random. Each floor has a fixed slot table: the item room and shop always fill the first two slots, and the rest are drawn from the pool per floor. The Boss room overrides slot 5, which is why the last slot often never appears.
| Slot | Floor 1 | Floor 2 | Floor 3 | Floor 4 |
|---|---|---|---|---|
| 1 | Item Room | Item Room | Item Room | Item Room |
| 2 | Shop | Shop | Shop | Shop (higher prices) |
| 3 | Challenge Room | Challenge Room | Mixed Room A | Challenge Room |
| 4 | Mixed Room | Mixed Room | Challenge Room | Mixed Room |
| 5 | — | Reward Room | Mixed Room B | Mixed Room B (often overridden by Boss Room) |
The Floor 4 shop raises its prices, and its shelves favor items and Curios — without extra shop slots unlocked on the Evolution Skill Tree, the Floor 4 shop sells no hearts or shields at all. Buy your healing on Floors 1–3.
Floors 5–8: The Pressure Half
- Damage taken doubles. On Floors 1–4 each hit costs half a heart/shield; from Floor 5 on, each hit costs a full heart.
- The Boss route locks in. Floors 5–8 have a fixed Target layout, and the Floor 6 Boss determines which final Boss your run leads to. The Targets board in the bar shows the unlock chains.
- Veewo has not published the slot table for Floors 5–8, but shops and item-type rewards still appear — plan the same way: survival resources first, damage second.
Co-op Rhythm
Up to 4 players online, with the lobby entrance at the Cyberspace console left of the bar. The connection is P2P, and the host acts as the server. Teams can split up to explore different rooms on the same floor, multiplying clear speed, but gated areas — Boss rooms, challenge rooms, the exit portal — require everyone to gather first. Enemy health scales up with player count. On death you become a ghost: a teammate can revive you for half a heart/shield, or you revive yourself by picking up a heart/shield. Ghosts can use activated Teleport Stones but cannot enter unexplored rooms. Full details in Co-op.
Full Room Type List
| Room | What you get | Priority |
|---|---|---|
| Combat Room | Room-clear reward; the main coin source | Clear everything |
| Shop | Guaranteed on Floors 1–4. Prices on 1–3: heart/shield 20 coins, item 70, weapon 50 | Must visit |
| Item Room / Chest Room | Guaranteed on Floors 1–4; free item or chest | Must visit |
| Challenge Room | Completing it always awards a weapon; Vaporize it if you don't like it | High |
| Reward Room | One free resource: keys, bombs, chests, hearts, coins, pet eggs, weapons, shields | High |
| Puzzle Reward Room | Added in 1.0; solve a small puzzle for a reward | High |
| Game Room | Minigames: basketball, dancing, piano, claw machine, ball pit, soccer, trampoline | Casual |
| Job Room | Fishing, gold panning, meditation; fishing gets more common in deeper floors | When broke |
| Blood Room | Spikes or wisp trades: pay health for rewards; enter with caution at low HP | Depends on HP |
| Gift Room | Floors 3–4 only | Pass by |
| Trade-off Room | Pick one option from capsules, common/meat vendors, vending machines | Depends on build |
| Hidden Room | Unlock the Hidden Room node on the Evolution Skill Tree first; one per floor at most, behind a bombable wall in the room adjacent to the busiest doorway | Worth the bomb |
| Weapon Upgrade Room | Each weapon level unlocks one; hangs at the map's edge | Must visit |
| Faith Temple | Opens on the current floor once your Faith gauge is full; teleport directly, once per floor per run | Go when full |
| Boss Room | The floor's Target at the far end; the portal down is the exit | The goal |
WARNING
Chests come in several types — normal, key, crystal, stone — and each needs its matching resource to open. If a Crystal Chest is hit by any attack (except from Hatchmon), it turns into a Heart Chest, and opening it costs a fixed 1 heart. Think before you spray bullets near one; at low HP that stray shot can be a death sentence.
Hazards and Floor Mechanics
Terrain is not decoration. These mechanics directly change your movement and resource decisions:
- Spikes. The fixed fixture of Blood Rooms; stepping on them costs a heart/shield per the hit rules and triggers i-frames. Advanced play deliberately steps on spikes to use the invulnerability window to walk through bullet clusters.
- Wisp trades. Some Blood Rooms take "losing a wisp" in exchange for a reward — functionally the same as spikes. Count your remaining hearts first.
- Rocks and breakable walls. Block side paths and hidden rooms. Bombs are always scarce — save them for hidden-room candidate walls over plain rocks.
- Crystal Chest trap. See the warning above: even your own bullets trigger the transformation.
- Platforming segments. Deeper combat rooms interleave platforms and pits with bullet patterns that squeeze your movement space. Moving while shooting is dramatically safer than standing still.
- Elite enemies. Some enemies roll elite affixes — more HP, upgraded movesets — inside normal combat rooms. Focus them down or keep your distance first.
TIP
Finding hidden rooms: when you enter a floor, trace the map for the room just outside the door ring that has the most connecting doors; the wall next to it is your candidate. With revelation-type items, the wall glows (Floor 1 only). When you have no clear lead, spend bombs on candidate walls rather than on rocks.
Resource System
| Resource | Uses and rules |
|---|---|
| Hearts / Shields | Health. Shared cap of 12; shields drain first. Half a heart per hit on Floors 1–4, a full heart from Floor 5 |
| Coins | Shop currency. Enemies drop almost none — room clears and Boss drops are the source, so never skip a room |
| Keys | Locked doors and key chests |
| Bombs | Rocks and hidden-room walls; permanently scarce, spend carefully |
| Crystals | Shop entrances, special-room doors, crystal chests, casting Curios; excess can be left on the ground and picked up later |
Items come in four classes: Artifacts (gold, passive, stack infinitely), Curios (purple, active, one slot), Relics (teal, equippable passive, droppable, one slot), and Hexjars (blue, throwable consumable, one slot). Each item drops only once per run — if one is destroyed, it will not reappear that run. Collecting 8 items of the same school grants a free Set Bonus, a mid-run power spike worth building toward.
Weapons level up by absorbing Soul Crystals: Vaporize weapons you don't want, and Boss kills both feed the meter. Each level raises base damage and unlocks a weapon-specific reward room. Pet eggs never hatch on their own — you need an item or pet effect that grants incubation progress (from kills, egg pickups, Crystal use, and so on). Hatchmon don't die: when hit they collapse, and touching one revives it at full HP.
Faith
- The starting room of every floor has a Faith Pillar. Hold Interact for 1.6 seconds to adopt a Faith and activate its mechanics (check the Faith mask in your inventory to confirm the effects).
- Swapping Faith is free on Floor 1; from Floor 2 onward each swap costs you one hit (half a heart/shield).
- Your actions fill a Faith gauge; when it maxes out, that Faith's Temple opens on the current floor with a direct teleport, limited to one visit per floor. The gauge resets when you descend. Per-Faith breakdowns live in the Faith system page.
TIP
Difficulty does not change item drop rates, but it noticeably sharpens Faith mechanics. Learn each Faith (Consumerism, Agapeism, Artisanism, and the rest) on Normal before pushing higher tiers.
Death and Meta Progression
- Solo: run ends when hearts/shields hit zero; only meta progress is kept.
- Co-op: death turns you into a ghost — revived by a teammate for half a heart/shield, or self-revived by picking up a heart/shield.
- Evolution Skill Tree is the meta-progression core; Evolution Points unlock nodes like Hidden Rooms and extra shop slots. Evolution Points come only from Bosses: each floor's Boss awards
100 + 5 × floor², multiplied by the difficulty factor (Easy ×1, Normal ×1.25, Hard ×1.5, Abyssal ×1.8). A full 8-floor clear is worth 1,820 base points — 2,275 on Normal.
Conclusion: pushing deep beats replaying the early floors over and over by a wide margin; safe houses don't count toward the floor total, and Evolution Points are best spent as soon as you get them.
Difficulty Tiers and Unlock Conditions
Switchable at any time from the bar — four tiers total. Drop rates are identical across all of them; the differences are survival pressure, Faith mechanic sharpness, and meta-progression yield:
| Difficulty | Hit invulnerability | Evolution multiplier | Unlock condition |
|---|---|---|---|
| Easy | 3.5s | ×1 | Available from the start |
| Normal | 2s | ×1.25 | Available from the start; recommended first clear |
| Hard | 1.5s | ×1.5 | Clear a Normal run |
| Abyssal | 1s | ×1.8 | Defeat Hyperion on Hard |
Two easy-to-miss subtleties:
- Win streaks quietly harden the same difficulty. Each tier has a hidden intensity offset that rises with consecutive wins and falls after a loss — the invulnerability window shrinks on top of the base values. When a familiar run suddenly feels harder, the game, not your hands, moved.
- Abyssal's core is "1-second i-frames + full-heart hits", stacked with the Floor 5+ damage rule. It effectively demands that you dodge nearly everything through Curio movement and shield management. Use "can I reliably reach Floor 5?" as your benchmark when picking a difficulty.
Sources
- Neon Abyss 2 Wiki — How to Play
- CapyDB — Neon Abyss 2 Beginner Guide and Special Rooms list
- TheGamer — How To Get Permanent Upgrades In Neon Abyss 2
- TheGamer — How To Unlock Every Agent
- Steam Community — Abyssal difficulty unlock discussion
- Steam — Neon Abyss 2 store page
- Co-Optimus — Neon Abyss 2 adds co-op
- Nintendo (Hong Kong) — Neon Abyss 2