A tracker that watches the PlayStation Store’s back end put Grand Theft Auto VI at 210GB on PS5 this week. GamesRadar ran the figure as unconfirmed, which is the right call: it came from PlayStation Game Size rather than from Rockstar, and Rockstar has published no install number at all. Kotaku reports that Insider Gaming’s own sources match it. So — very likely, not yet official, and worth writing down before launch day so it can be checked against the real thing on 19 November.
The sharper number arrived from the other end of the same week. S-GAME’s Phantom Blade Zero, out this week and reviewed on Monday, is 145GB on Steam and asks you to keep 300GB free to install it.
That second figure is the one worth explaining, because it is a plain consequence of how installers work and it keeps getting read as greed.
Why 145 becomes 300
The installer does not unpack in place. What you download is a compressed package. What you play is the unpacked game. For as long as the unpacking runs, both of those sit on the drive together, and only when the write finishes does the package get dropped. Double, plus change for the files being assembled, is exactly the shape you would predict.
Anyone who has synced a large Perforce depot onto a fresh workstation has met the same wall from the other side. The size a build is and the size a build needs while it lands were never the same number.
Where the gigabytes live
Textures, mostly. Count, more than resolution.
A PBR surface is not one image. Albedo, a normal map, then roughness, metal and ambient occlusion usually packed into the three channels of a single map, and sometimes height on top of that. Three or four textures per material before anyone has argued about whether they are 2K or 4K. Each one carries a mip chain, which adds roughly a third again on top of the base level, because the renderer needs every smaller version precomputed rather than generated at runtime.
So the budget question is how many unique materials a world contains, and whether a given wall is one tiling material used four hundred times or an authored one-off. Tiling is cheap on disk and shows its repeats. Uniqueness is expensive on disk and reads as a place somebody built. Rockstar’s house style has always sat at the expensive end, and a Leonida with hand-placed signage, graffiti, rust and shopfront clutter is a lot of one-offs.
Audio takes a serious share of the rest. Full voice performance, in several languages if the game ships them, and in GTA’s case radio stations full of licensed music. Speech compresses well. Mastered music does not, and nobody ships a radio station at a bitrate that makes the licensing look silly.
The ten gigabytes between PC and PS5
Phantom Blade Zero is reported at roughly 134.9GB on PS5 against 145GB on Steam. Same game, same week, about seven percent apart. That gap is the cost of shipping to hardware you have not met.
- One GPU family versus several. A console build can bake shader permutations for one driver and ship them; a PC build either carries caches for multiple vendors or compiles on first run, and usually does some of both.
- One decompressor versus many. The PS5 has the block in silicon, so packaging can be tuned to the thing that will do the unpacking. A PC build is tuned to an unknown CPU.
Neither of those is a flaw in the PC version. It is what portability costs, and seven percent is a fair price for it.
The SSD requirement is the change
Both games require an SSD, at minimum and at recommended spec alike, and that line does more work than the install figure does. Once a streaming system can assume hundreds of megabytes a second off local disk, the old reasons to keep a build small stop paying for themselves. Aggressive reuse, instancing, proxy meshes, corridor geometry built to hide a load behind a door — a good share of that was disk budget wearing a level-design hat.
Disk is now the cheapest thing in the build. So builds spend it, and the install grows because nothing is being set aside to hide the load any more.
Which is also the reason GTA’s performance argument lives somewhere else entirely. The case that a locked 60 is unlikely on PS5 and PS5 Pro alike rests on simulation work sitting on a CPU that the Pro barely improved. Storage and frame rate are separate bills from the same ambition.
Square Enix already walked into the other end of this arithmetic: it put FF7 Revelation on a single Blu-ray you cannot play until the download finishes. A 100GB disc stopped being able to hold a game of this size a while ago, and the physical edition of GTA 6 is reported to be a download code in a box.
A 1TB PS5 gives you something like 825GB to use. At 210GB plus whatever the day-one patch weighs, Rockstar is asking for a quarter of it.