Rasen launches into Steam Early Access with rollback netcode

Rasen has launched into Steam Early Access, putting Abyss Deepen’s fast, close-quarters arena fighter in front of PC players. The Steam listing describes a game built around PvP and PvE clashes, with players choosing from a roster of lethal characters and fighting through atmospheric arenas. ¹

The most notable technical pitch is GGPO-style rollback netcode. That is designed to keep online combat responsive when connections are less than perfect, which matters in a fighter where a late input can decide whether a parry lands or a hit gets through. Abyss Deepen also describes Rasen as a game about reading an opponent, timing attacks and shaping each exchange rather than simply trading blows. ¹

What Rasen includes

The Steam page lists several ways to fight. Players can face other people, team up with friends or take on AI opponents in duels, clashes and deathmatches. The listing also says matches can support up to eight players, while ranked play gives more competitive players a longer-term target. ¹

That mix gives Rasen a broader pitch than a one-on-one fighter. The game is aiming at players who want the tension of a duel, but it also has room for larger group battles and PvE sessions. The important caveat is that this is an Early Access release: the store page presents the current feature set, not a promise that every system is finished or that the final balance has been settled.

Combat is built around defensive reads as much as aggression. The Steam description highlights parries, blocks, dodges and sidesteps, followed by timed attacks and counters when an opening appears. It also mentions a Beast Mode that empowers abilities and encounters where players face multiple enemies at once. ¹

What to expect from Early Access

Rasen is not launching as a finished, fixed package. Abyss Deepen’s Steam presentation asks players to help improve the game through feedback, bug reports and community participation. That makes the current release particularly relevant for fighting-game fans who enjoy learning a system while it is still being tuned.

The practical question is whether the rollback implementation and combat rhythm hold up outside the store description. Those are things that need real matches to judge, especially once the player population settles and ranked play starts producing a clearer picture of the game’s balance. For now, the confirmed story is straightforward: Rasen is available on Windows PC in Steam Early Access, with PvP, PvE, ranked matches and GGPO-style rollback netcode as its main hooks.

Our opinion

Rasen has the right ingredients for an intriguing Early Access fighter. Rollback netcode is a meaningful promise rather than a decorative buzzword, and the combination of competitive matches, AI battles and larger multiplayer modes could give it more staying power than a narrowly focused arena brawler. The honest reason to watch it, though, is the combat itself: until players have tested the parries, counters and matchmaking under real pressure, the store page can only establish the design ambition, not whether Rasen has the feel to keep people coming back.