You can often find a bundle containing both Portal and Portal 2 for a price only slightly higher than a single game.
This is the primary platform for Portal 2. During major seasonal events like the Steam Summer Sale or Winter Sale , the game often sees discounts of up to 90%, frequently selling for less than $2. portal-2-pc-game-free-download-full-version
Occasionally, Valve or reputable retailers like Fanatical or Humble Bundle may include it in charity bundles or promotional giveaways. The Risks of "Free Download" Sites You can often find a bundle containing both
Portal 2 is well-optimized and runs on a wide variety of hardware: Windows 7 / Vista / XP Processor: 3.0 GHz P4, Dual Core 2.0 (or higher) Memory: 2 GB RAM portal-2-pc-game-free-download-full-version