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Valve was Found by Gabe
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Period: to
Valve Timespan
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Valve acquires TF Software PTY Ltd, maker of Team Fortress mod for quake
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Half life was released
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Team Fortress Classic was released
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Half life: Opposing force was released. developed by Gearbox Software
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Valve teamed up with the counter strike development team
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Counter strike 1.0 was released
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Half life: Blue Shift was released for PC only
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Half life 2 was announced in E3
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Steam was released
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Counter Strike: Condition Zero was released
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Counter Strike:Source was released
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Half life 2 was finally released
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Half Life: Episode One was released
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Team Fortress 2 was released
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Portal was released
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Left 4 Dead was released
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Left 4 Dead 2 was released
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Portal 2 was released
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Dota 2 was released
