If you are buying today, check a PC game price tracker(https://gamepriceradar.com/ ) because the October 18, 2026 Steam Weekend Deal lists Standard at $3.99 , Premium at $5.99 , and Arkham Collection at $8.99 , through October 22 . Premium is the sensible complete-content choice for a 100% run because it includes the Season Pass, although the base-game Knightfall checklist remains the same. The official PC storefront and support status can change after the promotion, so verify the listing before committing.