To view this easter egg players must have first gained access to the Soviet Installation area by playing through the campaign.
In a cabin near the train station in the Soviet Installation area players can find an interesting relic called, “The Game” which appears to be an ancient version of the Tetris video game. In addition to the very distinctly shaped game pieces, the parts also vary in color similar to it’s modern equivalent.
Like a few other relics, this one prompts two voice lines from Lara as she examines the artifact. Upon finding the game she states, “Another sculpture, but this one looks like a game.” This is then followed by a more obvious hint with her saying, “These piece look familiar… I know I’ve seen something like these before…“.