In the world of Metal Gear, the fate of characters can sometimes be ambiguous and subject to interpretation. However, based on the information provided in the games, it can be concluded that Snake, also known as Big Boss or Solid Snake, is not alive in Metal Gear Rising: Revengeance.
In the Metal Gear Solid series, Snake is portrayed as an aging and genetically modified soldier. In the final installment, Metal Gear Solid 4: Guns of the Patriots, Snake is shown to be suffering from accelerated aging due to his cloned nature and the FOXDIE virus within him. He is nearing the end of his life and his health deteriorates throughout the game.
Metal Gear Rising: Revengeance takes place four years after the events of Metal Gear Solid 4. The protagonist of the game is Raiden, a cyborg ninja who previously appeared in Metal Gear Solid 2. While Snake is mentioned in the game, there is no indication that he is still alive or involved in the events of Revengeance.
Furthermore, the events of Revengeance focus on a different storyline and gameplay style compared to the main Metal Gear Solid series. It is a fast-paced action game rather than a stealth-based tactical espionage game. The emphasis is on Raiden’s journey and his battles against various enemies, rather than continuing Snake’s story.
It is important to note that the Metal Gear Solid series is known for its complex narrative and intricate plot twists. While it is always possible for future games to introduce unexpected twists or bring back characters in some form, based on the information available, Snake’s story seems to have reached its conclusion in Metal Gear Solid 4.
Snake is not portrayed as being alive in Metal Gear Rising: Revengeance. The game focuses on a different protagonist and storyline, and Snake’s fate is established in Metal Gear Solid 4 as being near the end of his life. However, it is important to keep in mind that the Metal Gear Solid series has a history of surprises, so future developments could potentially change this interpretation.