: A .part1.rar file is just one piece of a larger multi-part archive. You cannot extract the game unless you have downloaded all the required numbered parts (e.g., part2, part3, etc.).
: You can purchase the official release directly on the SpellForce: Platinum Edition Steam Store. game-spellforce.platinum-(17748).part1.rar
The file name you provided— game-spellforce.platinum-(17748).part1.rar —appears to be part of a split WinRAR archive containing a pirated or unofficial copy of the PC game . 🛡️ Safety & Legal Risks game-spellforce.platinum-(17748).part1.rar