Unlocking the "Inventing the Past" quest in The Sims 4's Blast from the Past event requires locating Plathinum and Ironyum. Fortunately, finding these resources is straightforward.
This guide explains how to quickly obtain Plathinum and Ironyum in The Sims 4.
Locating Plathinum and Ironyum:
The method for finding Plathinum and Ironyum mirrors the process for discovering the Special Time Capsule. Simply locate an area with rocks and dirt mounds – parks are ideal locations. Pause the game to carefully scan the area. Once you spot a suitable mound, dig it up. It may take a few attempts, but you'll eventually unearth both Plathinum and Ironyum, unlocking the next quest stage: constructing the Time Travel Component.
If rocks and dirt mounds are scarce, speeding up in-game time can accelerate their appearance. However, avoid prolonged periods of sped-up time to prevent missing digging opportunities.
Blast from the Past Event Rewards:

The Blast from the Past event offers a range of rewards across four weeks:
- Week 1: Retro Deco Phone Set, Relevart Time Walkers, The Yesterday Set floor tiles, The Future’s So Bright “Sun” Glasses, The Fun-Fun Inflatable Set, Part One
- Week 2: Get Up! Alarm Clock, Be “The Emit” full body outfit, Bigger Gatherings Banquet, The Relevart Neck Stabilizer bow tie
- Week 3: The Fun-Fun Inflatable Set, Part Two, Dina Caliente’s LBD, New Retro Station Songs, Sticky Fingers aspiration
- Week 4: Surprise Birthday Cake, The ElectroDance Floor
While the event initially spans four weeks, The Sims 4 developers have extended it by two additional weeks, providing extra time to complete the challenges.
This concludes the guide on obtaining Plathinum and Ironyum in The Sims 4's Blast from the Past event. For future updates and events, consult the 2025 roadmap.
The Sims 4 is available now on PlayStation, Xbox, and PC.