In Test Chamber 18, I fell into the green acid and the game froze into a black screen. When I re-launch, I am unable to open my save files. Seems like a pretty harsh death consequence, eh? No worries, though. I understand it's a Beta. Here's my system info:

Processor Information:
Vendor: GenuineIntel
Speed: 3391 Mhz
8 logical processors
4 physical processors
HyperThreading: Supported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Unsupported
SSE41: Supported
SSE42: Supported

Network Information:
Network Speed:

Operating System Version:
Ubuntu 12.04.2 LTS (64 bit)
Kernel Name: Linux
Kernel Version: 3.2.0-41-generic
X Server Vendor: The X.Org Foundation
X Server Release: 11103000
X Window Manager: Openbox
Steam Runtime Version: steam-runtime-release-i386_2013-04-16

Video Card:
Driver: NVIDIA Corporation GeForce GTX 560/PCIe/SSE2

Driver Version:  4.3.0 NVIDIA 310.14
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 60 Hz
VendorID:  0x10de
DeviceID:  0x1201
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: 1023 MB
Supported MSAA Modes:  2x 4x 8x 16x 

Sound card:
Audio device: Realtek ALC892

Memory:
RAM: 15962 Mb

Miscellaneous:
UI Language: English
LANG: en_US.UTF-8
Microphone: Not set
Total Hard Disk Space Available: 453413 Mb
Largest Free Hard Disk Block: 381174 Mb

Installed software:

Recent Failure Reports: