List of popular first-person shooter games developed by Valve Corporation. first-person shooter games included on this list are displayed with photos when available, are in alphabetical order and were all developed by Valve Corporation. This list answers the question “what first-person shooter games has Valve Corporation made?” and contains additional information about each game if you click on its name. The list you're viewing is made up of a variety of different games, including Half-Life: Blue Shift and Half-Life 2: Episode One. You can use the games in this fact-based list to create a new list, re-rank it to fit your views, then publish it. (25 items)Ranker may collect a commission from links on this page. Prices & inventory are accurate as of publish date.