This is a great game from Bethdesda, it was the first I played in the series and it was a brilliant Survival Horror style First-Person Open-World Role-Playing Game. (SHFPSOWRPG).
If you even remoteley enjoyed or found interest in games like Skyrim, Fallout: New Vegas or other titles from Bethdesda, this one is VERY MUCH WORTH IT. The narrative is great, the main story can be completed in about a few hours, but if you roam the world and try to explore, interact and enjoy it then it will take well over decades for you to finish it. If you ever manage to finish all the sidequests, storylines, locate all the places on the map, experience all the random events and meet all the intriguing characters and learn of stories in the past or present gameworld; then you can play the DLCs, Broken Steel, Operation: Anchorage, Point Lookout and Mothership Zeta. The DLCs accumulate up to even more hours of main quests, not to ignore the fact they add new locations and maybe even a whole new part of the game world.
TL;DR: Get this game, it is ♥♥♥♥ing brilliant you slacker.