Mortal Kombat 1

Story mode and practice/tutorial is on disc and can be played offline.
Invasion Mode (the equivalent to MK11's Krypt) is online-only.
Towers can be beaten offline.
You won't receive XP/unlocks offline.
Disc install is a total of ~86 GB. Day one patch increases the install size to 114,5 GB
Offline you can’t earn trophies.

Offline contents and modes on disc build, no patch:
21 Base Characters
10 base kameos
18 arenas.

Cinematic Story (15 chapters, Shang Tsung DLC and Quan Chi kameo playable in the 13th, on last chapter you can select all base chars vs miscellaneous enemies)
Klassic Towers (5 towers types, endings after final boss)
Local versus (CPU\human) - Tournament (vsCPU\human)
Tutorial - Practice - Fatality training.
Photo mode - whatch models (in Kustomize).

*All Kameo Fatalities work with inputs from the in-game command list, but kameo brutalities seems not work before unlock.

*Fatalities 1 works fine for all characters, Fatalities 2 (list on the internet) work for all without unlocking, except Scorpion, Mileena and Rain, whose disc build inputs have not yet been found.
One standard brutality available for every chars, the others are unlockable online.


Online contents and modes:
Invasions (like the Krypt in MK11)
Reliquary (related to the Invasions)
Ranked\online versus
*Character challenges are available after D1 patch.
*Havik, 5 Kameos (Motaro, Shujinko, klassic Kung Lao-Sub Zero-Scorpion) and the Pyramid arena are unlockable online, same for all skins, cosmetics and gallery artworks. After the unlock, you can use them also offline.

First tester:

Tester experienced 2 crashes, both times around act 4 of the story.
Tester also experienced random, yet severe sound bugs. Sounds for kicks and punches wouldn't play properly, even resulting in entire fights without sound for these.


Second tester:

No freezing or block in story mode. However, the absence of music in certain arenas has been confirmed as a bug. Just recharge the chapter and the music comes back.
Sometimes between the end of the fight and the cutscene, there is a bit of stuttering. In some scenes, there’s little graphic errors and not updated models.

The attacks/moves list in game is incorrect for few characters, in particular General Shao's special move list is wrong, the same thing for the move list of Darrius (kameo), who has also an extra attack in the disc build, removed in patched version.
However, commands of the updated post-patch moves list (found on the internet) generally works also in build 1.00.

You can see the endings of every base characters beating the Klassic Towers, but endings do not remain saved offline in the archive.