And the proper elevator pitch for Thea is “Heroes of Might & Magic meets X-COM base building: the card game”.
You move around a HoMM map, with armies made up of individual people instead of unit stacks. You pick up resources around the map, hit encounters, order your dudes to hunt, mine, or craft around the map. You found a city and develop it using the resources you get. Develop it for special stuff, crafting better equipment for your dudes, buildings that give special bonuses or unlocking new character classes. You’ll periodically get new dudes in the settlement.
Combat is driven by a strange card game. Each character plays a card every round. You get more and better cards depending on your stats. Sometimes instead of combat, you’ll get a challenge encounter. Those will be something like “stealth” with a similar card game played out where winning the “battle” means you snuck around the obstacle. The cards you get for that will be different than combat and will draw on a specific set of attributes (hunting, pathfinding, “stealthy” stuff). The problem with that is while the game is very clear on how it gets the numbers for combat, you’re almost completely at a loss on what determines the special encounters and you won’t know how good your cards will be before going into one (it gives you options every encounter on what type it will be, but not exactly what they mean).
Ultimately, the game is about averting the apocalypse. It starts off hundreds of years after an apocalypse devastated the land and cut off all gods, leaving humans near extinct. Humans have just started getting organized again with ancient magical forces finally waking up again. You find that some disaster is pending and you have to avert it before a certain number of turns. You don’t know exactly what it is and you find out by exploring the map and doing quests. There are multiple victory conditions like “follow the quests to a final boss”, or “perform rituals to reawaken your god”. At the beginning, you pick a god and tribe that give certain bonuses with different approaches, unlocking more starting choices as you progress.