It looks like a sequel to the not-yet-released Rise of the Tomb Raider is inevitable.

Speaking to GameSpot at gamescom 2015 this week, Square Enix executive Phil Rogers referred to the series as a trilogy - despite not officially announcing a third entry.

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"We believe first and foremost this is the right thing to do with Tomb Raider right now," Rogers said about the deal with Microsoft to make the game available first on Xbox platforms.

"What it's done for the sake of the studio and the next beat with the Tomb Raider trilogy... But the backlash is - we've watched carefully and we believe it's the right thing to do."

Rise of the Tomb Raider is due out this November on Xbox One and Xbox 360, but not until next year on PS4 and PC.

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The upcoming game is said to feature a new Guerrilla Combat gameplay system that lets users take out the opposition in unique and interesting ways.

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There are new aerial takedowns, new stealth kills and a bow that lets players take out two enemies at once.

Follow our ongoing coverage of gamescom 2015