Unvanquished is an open-source FPS game featuring team-based strategy and RTS elements, pitting humans against aliens in a futuristic setting.
https://forums.unvanquished.net/
OS: Linux 3.7.0-7-generic x86_64 GNU/Linux, Ubuntu 12.10
GPU: Intel Corporation Mobile GM965/GL960 X3100
CPU: Intel Core 2 Duo CPU L7500 @ 1.60GHz
RAM: 3GB PC2-5300
I play with a Thinkpad X61 Tablet (with set cl_renderer GL) and a 21" LCD Screen (SyncMaster LED S27A550H). Sadly, my Trackman just died and this product is discontinued. 
OS: Windows 7 Professional 64-bit
GPU: XFX Radeon HD 6870 (1 GB )
CPU: AMD Phenom II x4 955 (Quad-core @ 3.2Ghz)
RAM: 16 GB DDR3 1333 Mhz (G.Skill if relevant)
Additionally:
I use two monitors, one at 1920 x 1080 and another at 1600 x 900, both of which are 16:9 aspect ratio.
1 TB hard drive running @ 7200 RPM.
No spoilers on the case just yet.
OS. Gentoo Linux 64 bits
GPU. GTX 670MX (3Go)
CPU. i7 3630QM (2.4GHz - 3.4GHz)
RAM. 12 GB DDR3 1600Mhz
Monitor. 1920 x 1080
Drive. 240Go SSD + I'll put game files on a 7200RPM 500Go HDD
OS: Windows XP
GPU: AMD 4870 1GB
CPU: AMD 720BE 2.8GHz [Tricore, yield problems with quad core = cheap cpu :) ]
Monitor: 1920x1080
Drive: 160GB
Computer blew up last week, it's a bit rag and tag, duct-taped, jurry rigged. Waiting on a new machine
OS: Win 7 64 bit
GPU: AMD Radeon HD 5770
CPU: AMD Dual core 2.2 ghz, over clocked to about 2.4
RAM: 4 GB DDR2
HD: 500g SATA1
OS: Arch x64
GPU: Nvidia GTX 670 with 2GB of RAM
CPU: AMD FX-8350 (octo-core) @ 4.9hghz
RAM: 16GB DDR3 1866Mhz
Drive: 120GB SSD + 4tb 5900RPM Seagate Drive
OS: Windows 7 64-bit
GPU: AMD Radeon HD 6640G2 (6400M + 6620G Crossfire) 1 GB VRAM
CPU: AMD Quad-Core A8-3500M @ 1.5 GHz with Turbo Core @ 2.4 GHz
RAM: 8 GB DDR3
Monitor: 1920 x 1080
Drive: 750 GB
Laptop Specs^
OS. 32-bit Windows 7
GPU. NVIDIA GeForce GTX 660
CPU. Intel Core 2 Duo E8400 3.0 GHz
RAM. 4GB DDR2
My home computer :
OS : Ubuntu 13.10 64bit
GPU : NVIDIA GTX560Ti (1 GB GDDR5 900Mhz) proprietary driver (support openGL 4.4)
CPU : I5 2500K (3,3 GHz 4,5 GhZ (turbo) quad-core)
RAM : 16 GB DDR3
And my laptop
OS : Ubuntu 13.10 64bit
GPU : Intel HD4000 intel open source driver (mesa 9.2 support openGL 3.1)
CPU : I3 3110M (3,3 GHz dual-core with hyperthreading)
RAM : 8 GB DDR3
I upgraded! (I still have the laptop for traveling)
OS: Linux 3.11.0-12-generic x86_64 GNU/Linux, Ubuntu 13.10, Gnome Shell 3.11 (with many PPAs)
GPU: AMD Radeon HD 7970 (1 GHz, 3 Gb)
CPU: AMD FX 8350 (8 cores, 4 GHz, 16 Mb)
RAM: G.Skill 32Gb DDR3 PC15000 (4 x 8 Gb, 1.6 GHz because the CPU can't handle more)
Drive: Seagate 4 Tb SATA 3.1 (in fact 2 x 4 Tb RAID 1) plus some drives more
Monitor: Samsung 27" 1920 x 1080 (the one quoted at #6614)
And I found a new Trackman on second-hand market. 
Now I can play with set cl_renderer GL3.
