On a standard retail PS3, you cannot simply execute a .pkg file from a USB drive. The console requires custom firmware (CFW) or PS3HEN (Homebrew Enabler) to unlock the "Install Package Files" option in the XMB (XrossMediaBar) menu.
The request for "Gears Of War 3 Ps3 Pkg" describes a non-existent piece of software. There is no technical pathway to play Gears of War 3 natively on a PlayStation 3 console.
To play Gears of War 3 PS3 PKG, you'll need:
is a flagship Xbox exclusive, a legitimate, playable prototype of the third installment was discovered running on PlayStation 3 hardware. The Origin: An Internal Engine Test In 2020, footage surfaced of Gears of War 3 running on a PS3. This was later confirmed by Epic Games
Since you cannot play Gears on your PS3, try these third-person shooters available on the PS3 store or disc:
Let’s cut straight to the chase. You will not find a PlayStation 3 package file (PKG) that installs and runs Gears of War 3 on PS3 hardware—whether jailbroken or not.
The iconic gritty atmosphere of Sera often flickers or disappears, revealing the "bones" of the game engine. 🚩 A Warning on "PKGs"
In the PS3 homebrew ecosystem, a .pkg (package) file is typically used to install digital games, updates, or homebrew apps directly onto the CrossMediaBar (XMB) of consoles running Custom Firmware (CFW) or PS3HEN.
To sell Unreal Engine 3 to developers working on the PlayStation 3, Epic needed to understand Sony's notoriously complex hardware architecture. The PS3 relied on the Cell Broadband Engine, a chip famous for being incredibly difficult to program for compared to the Xbox 360’s more traditional Xenon processor. The Ultimate Stress Test