At their core, adventure games are a series of difficult decisions the players must make with limited information, resources, and time. Whether you're designing an open-ended social adventure or a straight-up dungeon crawl, tough decisions are one of your best tools to inject drama, uncertainty, and challenge.
Tough decisions push players to thoughtfully manage they resources they're provided and engage with the details of your game world. Smart assessments lead your players to success with a minimum of loss, while poor assessments over time diminish your players' resources and ultimately lead to their demise.