https://r3tardsgam3.com/

R3 Apocalipsis is a fast-paced browser game built around the real r3tards NFT collection on Monad. Players shoot falling r3tards, rendered with their actual on-chain rarity, from common all the way up to the 38 Certified 1/1s. to rack up points, unlock achievements, and level up their weapon. It's completely free to play; the only cost is normal Monad network gas. Every match auto-saves itself: score, unlocked achievements, and every r3tard killed all go into a single recordMatch() transaction, no manual "save" button. A packed-bitmap on-chain registry tracks, globally and permanently, which of the ~1033 r3tards have ever been defeated by any player — this design choice cut the gas cost of a 50-kill match from ~1.37M to ~301K gas versus a naive bool mapping. Each wallet also gets a free, soulbound ERC-721 player card whose metadata (alias, best score, achievements) is generated live from on-chain state, so it "completes itself" as you play, with no re-minting. Two public pages read straight from contract events with no backend at all: a global leaderboard/achievements board, and a "Colección" page showing every r3tard in full color once it's been killed anywhere by anyone, and grayed out while still alive. Built with vanilla JS + ethers.js on the frontend and a Solidity contract (ERC721, Ownable, Pausable, ReentrancyGuard) deployed to Monad Mainnet, no backend, no hidden fees, everything from score tracking to the collectible bestiary lives entirely on-chain.