Open ended games with infinite playthrough value are the best bang for your buck when buying games. If you think a game is all about completing an objective you've been lied to. The point of video games is not just to get to the end of the game and see what happens. The point of a game is the journey along the way. Games with infinite stuff to do in the game are of way higher value to the player than games with a fixed sequence of events. There are people who have tens of thousands of hours spent on skyrim which is a $60 game. If you think skryim is a boring game because it is so quick to beat it, they know something that you don't about how to play it.

Some open ended open world games that are fastmonk approved are: minetest, bethesda games, the sims, real time strategy games, elden ring style games, multiplayer shootemup games with voice chat, red dead redemption, grand theft auto, and saints row. With an honorable mention to valve games.