I have similar problem. After I launch the game I see only black screen with cursor and music "the box is on fire". The problem is with 32 and 64 bit versions.
I have only this output from terminal:
Running Steam on linuxmint 18 64-bit STEAM_RUNTIME is enabled automatically Pins up-to-date! [2017-09-01 23:38:44] Startup - updater built Aug 28 2017 11:50:29 [2017-09-01 23:38:44] Verifying installation... [2017-09-01 23:38:44] Verification complete Refresh rate: 1 Refresh rate: 1 Refresh rate: 1 Refresh rate: 1 Refresh rate: 1 Refresh rate: 1 Found path: /home/x/.steam/steam/steamapps/common/WhatTheBox/WhatTheBox.x86_64 Mono path = '/home/x/.steam/steam/steamapps/common/WhatTheBox/WhatTheBox_Data/Managed' Mono config path = '/home/x/.steam/steam/steamapps/common/WhatTheBox/WhatTheBox_Data/Mono/etc' Preloaded 'ScreenSelector.so' Preloaded 'libCSteamworks.so' Preloaded 'libsteam_api.so' Player data archive not found at `/home/x/.steam/steam/steamapps/common/WhatTheBox/WhatTheBox_Data/data.unity3d`, using local filesystem
I'm running Linux Mint 18 with i3, but I have the same problem on Mate.
More hardware information from Steam:
Processor Information: CPU Brand: Intel(R) Core(TM) i5-6600 CPU @ 3.30GHz CPU Family: 0x6 CPU Model: 0x5e CPU Stepping: 0x3 CPU Type: 0x0 Speed: 3900 Mhz 4 logical processors 4 physical processors HyperThreading: Unsupported FCMOV: Supported SSE2: Supported SSE3: Supported SSSE3: Supported SSE4a: Unsupported SSE41: Supported SSE42: Supported AES: Supported AVX: Supported CMPXCHG16B: Supported LAHF/SAHF: Supported PrefetchW: Unsupported Operating System Version: Linux Mint 18 Sarah (64 bit) Kernel Name: Linux Kernel Version: 4.4.0-38-generic X Server Vendor: The X.Org Foundation X Server Release: 11804000 X Window Manager: i3 Steam Runtime Version: steam-runtime-beta-release_2017-07-24 Video Card: Driver: NVIDIA Corporation GeForce GTX 1070/PCIe/SSE2 Driver Version: 4.5.0 NVIDIA 384.59 OpenGL Version: 4.5 Desktop Color Depth: 24 bits per pixel Monitor Refresh Rate: 60 Hz VendorID: 0x10de DeviceID: 0x1b81 Revision Not Detected Number of Monitors: 1 Number of Logical Video Cards: 1 Primary Display Resolution: 1920 x 1080 Desktop Resolution: 1920 x 1080 Primary Display Size: 18,78" x 10,55" (21,54" diag) 47,7cm x 26,8cm (54,7cm diag) Primary Bus: PCI Express 16x Primary VRAM: 8192 MB Supported MSAA Modes: 2x 4x 8x 16x Sound card: Audio device: Realtek ALC887-VD Memory: RAM: 16011 Mb Miscellaneous: UI Language: English LANG: pl_PL.UTF-8 Total Hard Disk Space Available: 763728 Mb Largest Free Hard Disk Block: 36345 Mb VR Headset: None detected
I noticed that the game works well under wine.