10 of the Best Valve Developed Games of All Time

Portal

Portal is a pioneering type of single player action game that rewrites the rules for how players approach and manipulate their environment much like how Half-Life 2’s Gravity Gun reinvented the way gamers interact with objects in the game.

Counter Strike: Source

Counter-Strike for the PC is the world’s most popular online action game. With approximately 2.5 million Counter-Strike players worldwide and over 100,000 of them playing at any given moment, the action is non-stop. The intense, team-based multiplayer combat of Counter-Strike sprawls across various multiplayer. Players can battle against super-intelligent AI opponents’ offline in the single player game before taking their skills online against up to several players. Gamers have several real-life weapons at their disposal, including shotguns, sniper rifles, pistols and heavy weapons as well as new weapons effects such as grenade deafness and vision adjustments. Day of Defeat: Source

Day of Defeat: Source

Day of Defeat is a World War II multiplayer first-person action game that pits players in Axis vs. Allies battles in Western Europe at the height of the war in 1944. Players enlist as snipers, infantrymen, machine gunners, riflemen and sergeants, and then hit the frontlines running using authentic weaponry. The game, which initially debuted as a MOD, featured multiple modes of play, a total of 15 multiplayer maps of action – including 10 new maps, all new character models, hundreds of new animations, increased textures and all new particle effects system.

Left 4 Dead 2

With the AI Director 2.0, L4D’s dynamic gameplay is taken to the next level by giving the Director the ability to procedurally change weather effects, world objects, and pathways in addition to tailoring the enemy population, effects, and sounds to match the players’ performance. The result is a unique game session custom fitted to provide a satisfying and uniquely challenging experience each time the game is played. Adding new Survivors, boss zombies, weapons, and items, Left 4 Dead 2 offers a much larger game than the original, featuring more co-operative campaigns, more Versus campaigns, new Survival maps, and the new competitive game mode and Scavenge.