I am working on a nostr-based item system for video games. Players can create their own items with customized stats (think mech parts for Armored Core 6, or guns in Call of Duty, or World of Warcraft items) but the stats must be paid for via NIP-13 proof-of-work. This enables ultimate creativity, guided by a game's stat rules, and constrained by thermodynamics. Consequently, an interesting result of a POW-based item system is that your thermodynamic power in reality can translate into in-game power, and although skill and luck should also be necessary, this can effectively make any game a proxy for real life competition.
Another interesting aspect of nostr-based game items is that you can bring your items via your pubkey into different video games, making persistent interoperable items that exist between experiences.
There is a lot to explore in this space.
nostr:nevent1qqsy3z4qvjqpkzvusr0mq0f6kz8ldc0cytuzvh9qrnx5ymvwxy32jkqpz3mhxue69uhhyetvv9ujuerpd46hxtnfdupzqpxfzhdwlm3cx9l6wdzyft8w8y9gy607tqgtyfq7tekaxs7lhmxfqvzqqqqqqyuer707