Phantom Blade Zero launches with a day-one patch that improves ray tracing and fixes some bugs.

Phantom Blade Zero Launches With a 145GB Install Size and a Day-One 5GB Patch

Launch background: a large install and a day-one patch promise

Phantom Blade Zero has been released as an action game. Its install size is 145GB, though it is technically 300GB only for a short period. Like many large releases, it has not arrived completely finished. A day-one patch has been promised to address some of the game's issues, but there is no clear indicator whether it had already arrived at the time of the report.

Update development: 5GB, ray tracing, path tracing, and bug fixes

According to a Steam blog post, the update adds an extra 5GB. The post says it is intended to significantly improve ray tracing and path tracing performance and includes several bug fixes. Players who already pre-loaded the game are asked to download and install the update before launching. Players who did not pre-load are told their download will automatically include the latest version. The wording makes the patch sound available, but there are no patch notes to confirm the full set of changes.

Visual reach: rasterized visuals, PCs, and handhelds

The team says it spent a great deal of time refining the game's rasterized visuals so each environment stays true to its art direction even when ray tracing is turned off. That design choice gives players another way to experience the game without relying on the most demanding lighting features. The post also says the game should work on mid-range and lower-end PCs, and on handhelds too. Reports on the game's discussions page and elsewhere, however, include some users encountering trouble.

Latest technical guidance: NVIDIA driver 621.01 and rollback to 617.42

The Steam blog post gives a specific graphics-driver warning. It states that the team has observed performance instability with NVIDIA's latest 621.01 driver. Based on the team's testing, version 617.42 currently offers the best experience in Phantom Blade Zero. If a player has installed a driver newer than 617.42, the post recommends rolling back to 617.42 and choosing the clean installation option. It asks players to stay on that version until NVIDIA releases its next driver update, which the team expects to arrive soon.

Current stage: launch-day patch status remains partly unclear

Phantom Blade Zero's launch picture is defined by a few concrete numbers: a 145GB install size that can be technically 300GB for a bit, a 5GB day-one update, and a driver recommendation that favors 617.42 over 621.01. For readers, the practical meaning is to install the update before launching if the game was pre-loaded, be prepared for a temporary disk-space spike, and follow the driver rollback advice if using a newer NVIDIA driver. At the same time, the lack of a clear indicator of patch arrival and the absence of patch notes keep the day-one update partly unconfirmed in detail. Nothing in the available information sounds like a massive dealbreaker yet, but the launch remains a work in progress rather than a fully settled release.