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Rockstar Games
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Rockstar Leeds
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Rockstar London
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Rockstar North
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Rockstar San Diego
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Rockstar Toronto
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Rockstar Vancouver
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Rockstar Vienna
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Rocksteady Studios
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Roll7
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Rombax Games
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Romero Games
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Rondomédia
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Ronimo Games
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Roost Games
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Rotobee
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Rovio Mobile Ltd.
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Rowan Software
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RPG Factory
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RTL Enterprises
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RTL Playtainment
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Rude Ghost
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Ruffian Games
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Run Time
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Rundisc
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Rune Craft
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Runecraft
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Runestone Game Development
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Runewaker Entertainment Ltd
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Runic Games