Here is my entry for Challenge 3:

Twitter:

Reddit: ~~~ embed:BlockchainGame/comments/sxckbb/psyberx_play2earn_fps_game_on_hive_blockchain/ reddit metadata:fEJsb2NrY2hhaW5HYW1lfGh0dHBzOi8vd3d3LnJlZGRpdC5jb20vci9CbG9ja2NoYWluR2FtZS9jb21tZW50cy9zeGNrYmIvcHN5YmVyeF9wbGF5MmVhcm5fZnBzX2dhbWVfb25faGl2ZV9ibG9ja2NoYWluL3w= ~~~

EmoneySpace: https://www.emoneyspace.com/forum/index.php/topic,530918.0.html

Noise.Cash: https://noise.cash/post/zx5r825b9gkvv

Medium: https://medium.com/@aaonion/psyberx-the-play2earn-fps-game-on-hive-blockchain-f0156564fb3c