What are some alternatives?
When comparing Counter-Strike and BioShock, you can also consider the following products
Xonotic - Xonotic is a free (GPL), fast-paced first-person shooter that works on Windows, OS X and Linux.
DotA 2 - Dota 2 is a Free-to-play, Action-Adventure, Multiplayer Online Battle Arena, Single and Multiplayer video game created and published by Valve Corporation.
Battlefield - The latest news and updates for all things Battlefield, the EA and DICE video game franchise.
Doom - Doom is a science fiction horror-themed first-person shooter video game in which players assume the...
AssaultCube - AssaultCube is a FREE multiplayer first-person shooter game. Taking place in realistic environments, with fast, arcade gameplay, it's addictive and fun!
Hard Reset - Hard Reset is an Addictive, Action, FPS (First-person Shooter), Sci-fi, and Single-player video game developed by Flying Wild Hog and published by Gambitious Digital Entertainment.