Negotiation is over. Tom Clancy's Rainbow Six Siege Rainbow Six Siege is a game in the Rainbow Six series developed by Ubisoft Montreal . The Rainbow Six Series is an old FPS game. It is an FPS game based on a novel by Tom Clancy and contains a story about Rainbow, an anti-terrorism unit. It is a game that is differentiated from other FPS that focuses only on killing the opponent because it focuses on tactical operations. image / reddit What's the Rainbow Six series? It is no exaggeration to say that all FPS games dealing with post-21st century military topics were influenced by Rainbow Six, which laid the foundation for related games. Many say that the CounterStrike series , now most successful FPS game , would not have been created without the Rainbow Six series. The game took the realistic aspect very seriously and reflected many of these aspects. Thanks to these characteristics, the difficulty is also high. The crew can die with one injury, and there are many difficultie...