What is the actual size of each Halo game in the Collection? I saw the requirement for CE is 25GB, but when I bought it, it's only said 9GB?

[The Basilisk.]

One of the big factors lead me to buy some dlc and not the main game is the size, why is Halo 2 worth 35 gb???

But after purchase Halo 1, it's only say 9 gb, what?

[SigmaSquadron]

The following table lists the individual DLCs and their sizes as of 2024-01-01, according to the Steam depot sizes.

Name	Size
Halo: Reach	9.07 GB
MCC - Reach: Extended Language Pack	1.36 GB
MCC - Reach (Content Pack 2)	7.29 GB
Halo: Combat Evolved Anniversary	9.22 GB
MCC - H1: Extended Language Pack	890.65 MB
MCC - H1: Multiplayer	5.01 GB
Halo 2: Anniversary	29.14 GB
MCC - H2: Extended Language Pack	537.92 MB
MCC - H2: Multiplayer	27.55 GB
Halo 3	8.39 GB
MCC - H3: Extended Language Pack	1.77 GB
MCC - H3: Multiplayer	8.69 GB
Halo 3: ODST	8.13 GB
MCC - ODST: Extended Language Pack	1.44 GB
Halo 4	23.26 GB
MCC - H4: Extended Language Pack	3.47 GB
MCC - H4: Multiplayer	19.26 GB
Halo: The Master Chief Collection	15.94 GB
Total	180.42 GB

Notes:

• "Halo: The Master Chief Collection" refers to the base files that are always installed.
  
• In bold are the campaign files required to play the campaign. The multiplayer components are installed separately. The multiplayer component for Halo: Reach is "MCC - Reach (Content Pack 2)".
  
• If you're looking to play the series in English, the Extended Language Packs are not required.

[MeowDread]

thats like 163.05 gb, damn thats a lot

[Robert F.]

Here is the total size for Halo 2 campaign and multiplayer.

Halo2:
-Classic Campaign/Multiplayer: 4.26GB
-Anniversary Campaign: 16.8GB (mostly shared map and sound assets)
-Pre-rendered Videos: 3.16GB (terminals) / 5.54GB (H2A cutscene)

-Anniversary Multiplayer (modified version of Halo 4): 7.89GB

[SigmaSquadron]

Originally posted by Bizargh:

My current installation of The Master Chief Collection, which includes everything besides the Extended Language Packs, totals at "126 GB (135,683,704,833 bytes)", with the 'Size on disk' for the NTFS HDD I have it installed on being "126 GB (135,696,710,896 bytes)"

And this is where we get to filesystem tricks such as transparent compression. On my Linux system with the BcacheFS filesystem, the full game, with all of the DLCs including the extended language packs, takes about 117.34 GiB (that's around 125 GB) when compressed with lz4 level 9. When viewing the folder in its uncompressed state and without CoW, it's reported as 162.94 GiB (around 174 GB). That's a compression ratio of around 1.388, which is to be expected for such binary-heavy files.
NTFS has similar compression methods, which explains the several gigabytes of space that's saved between what Steam reports as the true size of the MCC files, and what we see in our computers.

[SigmaSquadron]

Originally posted by Bizargh:

'Tis why I mentioned my storage device. These things can vary in numerous ways from storage drive formats to operating systems' file storage techniques that I usually don't know of. Plus, I like to make sure that if I end up being wrong about something or what I end up saying isn't as broadly applicable as I might realise, you can at least gather why I might be wrong about it or where it isn't applicable.

What I'm saying is that your results are probably more in line with what the end user practically wants, so if anyone has the question "how much space do I need", the most correct answer would be 126-ish GB like you said.