Portal Under the Stars

You've sweated in someone else's fields your whole life. Old Man Roberts, dying, spoke of a star that opens doors to buried treasure, and the iron men that took his fingers.

The star's rising again tonight. Grab your pitchfork.

Level 0 funnel: several disposable peasants each, because most won't reach the treasure room.
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Dungeon Crawl Classics: the game where you fight unknown monsters, speak with alien gods, and find ancient magicks... and then you reach level 1. Old-school D&D turned up to the max: wild unpredictable magic, fighters pulling off legendary feats of arms, and ordinary nobodies who might just become heroes, if they survive.