Seconded, I noticed no issues either, AMDGPU open source driver on AMD 7790HD Arch Linux and proton 3.7, system info: https://gist.github.com/shikaku2/654059fa5af54028d02f7fa77a0b9fb9

Steam Overlay doesn't render correctly and game window doesn't fit within available space.

Distro: Ubuntu 18.04.1
GPU: Intel Iris Pro 580
Resolution: 1280x720
RAM: 32GB
Controller: DS4
Proton 3.7-5 Beta

https://gist.github.com/daasuharo/cb605b8cd50227982a9bfa4dfcb1f635

Runs perfectly-well!
Linux Mint 18.3, Nvidia GTX970 with 396.54, Proton 3.7.5 Beta.

Can't continue watching cutscene after pausing (it freezes). It is only possible to skip it.
Everything else is okay.

Linux Mint 19 Tara (64 bit)
Kernel Version: 4.17.19-041719-generic
NVIDIA GeForce GTX 1060 6GB/PCIe/SSE2, driver 4.6.0 NVIDIA 410.73
Proton 3.16-3 beta

The higher the selected resolution in the options, the lower you need to set the anti-aliasing, or the screen will either flicker or turn fully black.

Ubuntu 18.04
Kernel 4.15
NVIDIA GeForce GTX 970, NVIDIA 415.25
Proton 3.16-6 beta

i want to provide an update for this even if its a late one

on proton 3.16-4 this issue happens:

Can't continue watching cutscene after pausing (it freezes). It is only possible to skip it.

on any newer version the game will crash on changing resolution from or to 1920x1080 and it will be much more crash prone, funnily enough the cutscene bug is not present in any version newer than 3.16-4

adding PROTON_FORCE_LARGE_ADDRESS_AWARE=1 %command% to the launch options indeed fixes the crash issue, on both proton 3.16-9 and 4.2-7

thanks for the tip, btw

The game crashes every time when I try to increase resolution.
steam-235460.log

But adding PROTON_FORCE_LARGE_ADDRESS_AWARE=1 %command% would avoid this crash.

$ inxi -bM
System:    Host: localhost.localdomain Kernel: 5.2.0-0.rc7.git1.1.fc31.x86_64 x86_64 bits: 64 Desktop: Gnome 3.33.3 
           Distro: Fedora release 31 (Rawhide) 
Machine:   Type: Desktop Mobo: ASUSTeK model: ROG STRIX X470-I GAMING v: Rev 1.xx serial: <root required> 
           UEFI: American Megatrends v: 2304 date: 05/03/2019 
CPU:       8-Core: AMD Ryzen 7 2700X type: MT MCP speed: 2940 MHz min/max: 2200/3700 MHz 
Graphics:  Device-1: Advanced Micro Devices [AMD/ATI] Vega 20 [Radeon VII] driver: amdgpu v: kernel 
           Display: wayland server: Fedora Project X.org 1.20.5 driver: amdgpu resolution: 3840x2160~60Hz 
           OpenGL: renderer: AMD Radeon VII (VEGA20 DRM 3.32.0 5.2.0-0.rc7.git1.1.fc31.x86_64 LLVM 8.0.0) v: 4.5 Mesa 19.1.1 
Network:   Device-1: Intel I211 Gigabit Network driver: igb 
           Device-2: Realtek RTL8822BE 802.11a/b/g/n/ac WiFi adapter driver: rtw_pci 
Drives:    Local Storage: total: 11.57 TiB used: 9.92 TiB (85.7%) 
Info:      Processes: 477 Uptime: 18h 24m Memory: 31.29 GiB used: 20.52 GiB (65.6%) Shell: bash inxi: 3.0.34 

Dualshock4 does not work in game, and problems with resolution (1920x1080) as in this report https://www.protondb.com/app/235460#ksn4zsiux
steam-235460.log
https://gist.github.com/soredake/ed1fa30f885371dda5f331815920a3ae

Proton 5.0-9
steam-235460.log

Proton 5.13-1, same problem in fullscreen.
steam-235460.log

Game doesn't detect my savegame that was created under Windows. The game uses a hardcoded path for its saves but also supports cloud saves. Yet every time I launch it, the save slots are all empty on Linux even after copying the Windows save files into the prefix (which Steam actually does itself on first launch - probably sourced from the cloud) for the "steamuser" user.

Tested under both v5.0-10 and 6.3-4

@soredake

Replying to https://github.com/ValveSoftware/Proton/issues/787#issuecomment-663372675

This still occurs in Proton 6.3-8, by the way; though, I patched my executable to replace 800x600 with 3840x2160 (my native resolution)
Selecting this option fixes the issue for me (at the cost of the UI glitching out over an unsupported resolution), but selecting those other options are just as borked as your screenshots

This might be a problem for playing the game on the Steam Deck, by default...

For reference:

Widescreen Patch:
https://www.pcgamingwiki.com/wiki/Metal_Gear_Rising:_Revengeance#Widescreen_resolution
(Direct link)

MGROverride_1.1.zip SHA256 checksum:
ec05df1884d8f4279b63f9ac099056169c3bb93ff6b88ac8015ad0de9bb4323d

Patched Game executable SHA256 checksum:
23a89ae5a85e0a2fe8a9027421f4ed5cd2540eb58ee6868d6f1fbf85173421b2

Game crashes when setting it full screen on proton 7. Works completely fine on proton 6.3-8.

Ubuntu 20.04.4 LTS
Kernel 5.13.0-30-generic
resolution 1440x900, 1920x1080
Intel i7-4790K (8) @ 4.600GHz
NVIDIA GeForce GTX 980
NVIDIA driver 510

@Robmike27 Are you able to post a proton log? 🙂

@Blisto91
Yeah I'm sorry I didn't post one before.
steam-235460.log