Blacklight: Tango Down (PC) vs Portal 2 (PC)

In Blacklight: Tango Down, experience the bleeding edge of advanced warfare. Participate in the “NetWar”: a hyper-realistic battlefield letting you fight tomorrow’s conflicts with or against your friends in the gritty Blacklight universe. Customize your character and weaponry from among thousands of combinations to become the soldier you always wanted to be. Prepare for battle this summer on Xbox LIVE Arcade!

Over 10 multiplayer maps across seven multiplayer game modes: Play competitively online against friends and foes in favorites such as Team Deathmatch, Domination, Retrieval, Last Man Standing, and Detonation.
Black Ops: Enhance your skills in four cooperative Black Ops missions with support for one to four players. These missions explore the Blacklight universe and the events surrounding the conflict in Balik. Take on The Order and the insurgent population of Balik to complete strategic missions that change dynamically each time you play! Compete for the top spot in the leaderboards as well.
Customizable character and weaponry: Highly-customizable weapons allow you to modify the way your firearms shoot, look, and feel from among thousands of combinations. Customize your soldier’s look to become the soldier you always wanted to be.
Exciting new weapons and supports systems: Use EMP grenades to disable opponent’s electronic visors, Digi grenades to distort enemy optics, and futuristic weaponry based on real research concepts and development.
Net-centric warfare or “NetWar”: NetWar allows players to utilize HRV, hyper reality visors giving players a tactical view of the battlefield. Use it to your advantage to get the drop on your enemies or find your next objective.
Deep player award and ranking systems: Receive points for more than just killing an enemy. In matches, the game tracks each player’s actions, such as capturing control points, supplying ammo, or inflicting damage to an enemy without killing him. All of these aspects give the players points during a match. These points unlock new ranks, weapons, weapons attachments, and more!

The highly anticipated sequel to 2007's Game of the Year, Portal 2 is a hilariously mind-bending adventure that challenges you to use wits over weaponry in a funhouse of diabolical science. Using a highly experimental portal device, you’ll once again face off against a lethally inventive, power-mad A.I. named GLaDOS. Break the laws of spatial physics in ways you never thought possible, with a wider variety of portal puzzles and an expansive story that spans a single player and co-op game mode.