It looks like you're referring to a Steam-Rip (a cracked/pirated copy) of Assassin's Creed: Revelations released by RG Mechanics (often abbreviated RG or R.G. Mechanics), not "RG Pi..." (possibly a typo or misremembered group name like RG Catalyst or RG Gamer).
If you want to experience the gripping conclusion of Ezio's story safely and legally, the best method is to purchase the game through verified digital storefronts. Assassin-s Creed Revelations Steam-Rip by RG Pi...
Julian froze. The static monsters were closing in. The screen was flickering, the pixels dissolving into grey void. It looks like you're referring to a Steam-Rip
: A story-focused DLC featuring Desmond Miles in first-person puzzle-platforming levels. Ancestors Character Pack showing Ezio standing on a cliff
The game was running. The menu screen was open, showing Ezio standing on a cliff, looking out over the sea.