Home / Games / UNDER NIGHT IN-BIRTH II Sys:Celes
UNDER NIGHT IN-BIRTH II Sys:Celes
The newest riveting installment in the epic Under Night In-Birth saga rises from the Abyss! Improved visuals and battle system! Witness the curtain fall on the tale of the Hollow Night. Vie for supremacy through exhilarating combat and a deep, robust battle system!
In short, Steam reviewers most often praise “Deep GRD-driven fighting mechanics” (53 of 104 reviews) and “Rollback, ranked matches, and netplay” (7); the most common complaint is “Sparse online population and weak netcode” (10). What reviewers agree on ↓
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-29 · quoted reviews as of 2026-05-13.
What reviewers agree on
53 of the 104 reviews raise this.
“Easily the best fighting game out right now. Uni 2 trumps street fighter, strive, tekken, granblue, cotw, and every other 2d traditional fighter”
“If you're ♥♥♥♥♥♥♥♥ about strive or "the state of modern fighting games" and you aren't sinking hours into this you're just full of ♥♥♥♥.”
“ℂ𝕠𝕞𝕖, 𝕞𝕒𝕤𝕥𝕖𝕣 𝕥𝕙𝕖 𝕚𝕞𝕞𝕠𝕣𝕥𝕒𝕝 𝕟𝕚𝕘𝕙𝕥. Under Night In-Birth II Sys:Celes is a refined and highly technical 2D anime fighter that builds on its predecessor with smarter mechanics and smoother online play. The combat system;…”
7 of the 104 reviews raise this.
“ℂ𝕠𝕞𝕖, 𝕞𝕒𝕤𝕥𝕖𝕣 𝕥𝕙𝕖 𝕚𝕞𝕞𝕠𝕣𝕥𝕒𝕝 𝕟𝕚𝕘𝕙𝕥. Under Night In-Birth II Sys:Celes is a refined and highly technical 2D anime fighter that builds on its predecessor with smarter mechanics and smoother online play. The combat system;…”
“Seems like the endpoint of my fighting game journey, going from street fighter to strive to here. It just does something nothing else on the market really does, and very well. Hard to get into, not gonna lie, but in…”
“Tons of cool characters with unique playstyles and mechanics, deep system mechanics, and well-implemented rollback netcode.”
6 of the 104 reviews raise this.
“very cool art style”
“it's a pretty solid game imo. nice graphics and fluid movement too. Despite some poeple saying its a difficult game, i've been having fun just learning it.”
“white girl + whip + skirt + thigh highs = phonon = peak”
5 of the 104 reviews raise this.
“Seems like the endpoint of my fighting game journey, going from street fighter to strive to here. It just does something nothing else on the market really does, and very well. Hard to get into, not gonna lie, but in…”
“Very fun. Extremely high skill-ceiling. Unique characters. Always something new to learn in this game! Highly recommend!”
“Very interesting system mechanics that are fun to play around. A mix of simple characters, freaks and very complex characters but give you so many options. You'll have plenty to sink your teeth into. Singleplayer stuff…”
10 of the 104 reviews raise this · 7 of them still recommend the game.
“This game is so much fun, I love how technical everyone is and how the core mechanics are super important when in neutral and throughout each round. It's such a shame that there are barely any ppl that play this game,…”
“This game is good. REALLY good. It can be hard to find matches unless you join the discord community but if everyone reading this buys the game and starts playing online, problem solved! Do your part!”
“It's a good game it's just hard to find matches.”
9 of the 104 reviews raise this · 3 of them still recommend the game.
“this game sucks but unfortunately one of the coolest characters ever devised is in it. i think defense used to actually exist in this game but they patched it out over time, so maybe if they ever fix that it won't suck”
“good besides 2 characters: phonon and izumi”
“it's pretty good. GRD system is forever innovative as ♥♥♥♥. Neutral is fun to play because of it. It may be a bit overtuned as far as damage and coverage goes.”
8 of the 104 reviews raise this · 7 of them still recommend the game.
“This game is so much fun, I love how technical everyone is and how the core mechanics are super important when in neutral and throughout each round. It's such a shame that there are barely any ppl that play this game,…”
“This game is good. REALLY good. It can be hard to find matches unless you join the discord community but if everyone reading this buys the game and starts playing online, problem solved! Do your part!”
“Best 2D fighting game there is. Should be way more popular.”
7 of the 104 reviews raise this · 4 of them still recommend the game.
“Seems like the endpoint of my fighting game journey, going from street fighter to strive to here. It just does something nothing else on the market really does, and very well. Hard to get into, not gonna lie, but in…”
“it's a pretty solid game imo. nice graphics and fluid movement too. Despite some poeple saying its a difficult game, i've been having fun just learning it.”
“learning curve is steep but the game is very unique and FUN. Combos are irritating but the neutral is insane. Huge amount of mindgames.”
4 of the 104 reviews raise this · 1 of them still recommend the game.
“this game sucks but unfortunately one of the coolest characters ever devised is in it. i think defense used to actually exist in this game but they patched it out over time, so maybe if they ever fix that it won't suck”
“Legit one of my favorite fighting games of all time. It's a bit much on sale for what ya get and is lacking some features, but the core gameplay loop is addicting.”
Counted across 104 English reviews, sampled to match this game's 87.3% positive rating · as of 2026-05-13
“this game is so damn good it makes me wanna merge without looking”
— a player, Steam review · 28 hrs played“I find it to be a fun fighting game that has an interesting arcade/story mode and was worth half off to play occasionally. I don't play it online. It's not going to be a 70+ hour fighting game, but it adds to the variety of fighting games I enjoy playing. Sometimes it's nice to…”
— a player, Steam review · 13 hrs played“[Saying this as someone new to the genre and does not have a lot of time actually playing against people in this game] I have always floated around the genre but never seriously tried to pick up a fighting game until I gave UNI 2 an honest attempt. The tutorial is the most…”
— a player, Steam review · 32 hrs playedPlayer activity
Monthly average concurrent players. Live data self-collected from the Steam API · history through 2026-06 via SteamCharts.
Achievement stats
Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-10-23.
Price tracking
US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.
Regional prices at last sample, in local currency — Steam sets each region's price independently.
Cheapest → most expensive, converted to USD at ECB reference rates (2026-10-23). Relative comparison only.
Latest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
[Ver.1.43]Patch Notes
The version 1.43 update fixes in-game issues from version 1.42. We sincerely apologize for the trouble caused. ■ Overall Changes Changed battle version to 1.43. Fixed minor issues. ■ Battle Related Ad
[Ver.1.42]Patch Notes
The version 1.42 update mainly fixes in-game issues from version 1.41. The outline and purpose of the game balance changes are summarized in the “Battle Related Adjustments” section. ■Overall Updates
New DLC character "Zohar" & v1.40/v1.41 update!
The version 1.40/1.41 update includes the addition of a new character, Zohar, as well as balance adjustments to existing characters and game systems. ▼\ Patch Notes https://www.arcsystemworks.jp/porta
DLC Character #4 "Zohar" Character Trailer
Claws encroaching unseen, the "Doppelganger" joins the battle under the dark veil!
[Ver.1.35.01] Patch Release
This update aims to improve the network connection issues occurring for some players under certain conditions. While we cannot guarantee this patch will fix the issues for all play environments, we ex
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-05-13.
| Genres | Action |
| Player tags | Action · 2D Fighter · Arcade · Anime · 2D · Spectacle fighter · Pixel Graphics · PvP · Fighting · Multiplayer · Local Multiplayer · Comic Book (SteamSpy community voting) |
| Features | Single-player · Multi-player · PvP · Online PvP · Shared/Split Screen PvP · Shared/Split Screen · Steam Achievements · Full controller support |
| Languages | English, French, Italian, German, Spanish - Spain, Japanese * , Korean, Simplified Chinese, Traditional Chinese * |
| Controller | Full support |
| Achievements | 27 |
Minimum system requirements (PC)
Minimum: OS: Windows 10 / 11 Processor: Intel Core i5, 3.2 GHz Memory: 4 GB RAM Graphics: Nvidia GeForce GTX 680 / Radeon HD 7970 DirectX: Version 9.0c Network: Broadband Internet connection Storage: 20 GB available space Additional Notes: Display Resolution 1280x720 and above recommended.