Half-Life 2: Platinum Edition by Electronic Arts

(Based on manufacturer's information)Half-Life: Source
Winner of over 50 Game of the Year awards, Half-Life set new standards for action games when it was released in 1998. Half-Life: Source is a digitally remastered version of the critically acclaimed and best selling PC game, enhanced via Source technology to include physics simulation, enhanced effects, and more.

Half-Life 2: Half-Life 2 defines a new benchmark in gaming with startling realism and responsiveness. Powered by Source™ technology, Half-Life 2 features the most sophisticated in-game characters ever witnessed, advanced AI, stunning graphics and physical gameplay.

Half-Life 2: Deathmatch
Fast multiplayer action set in the Half-Life 2 universe! HL2's physics adds a new dimension to deathmatch play. Play straight deathmatch or try Combine vs. Resistance teamplay. Toss a toilet at your friend today!

Counter-Strike™: Source™
Counter-Strike: Source blends Counter-Strike's award-winning teamplay action with the advanced technology of Source™ technology. Featuring state of the art graphics, all new sounds, and introducing physics, Counter-Strike: Source is a must-have for every action gamer.

Day of Defeat™: Source
Day of Defeat offers an intense brand of online gameplay set in the WWII European Theatre of Operations. Players assume the role of light/assault/heavy infantry, sniper or machine-gunner class, and missions are based on historical operations. Day of Defeat: Source features enhanced graphics and sounds design to leverage the power of Source, Valve's new engine technology.