Iron Shelter is a free card game for Android developed by YooGames2020. The game takes place in a world where the Stone of Mother, a unique crystal from a mysterious peak, has shattered into countless shards and scattered throughout the underground of the continent. Your mission is to recruit a team of mecha-heroes to search for crystal shards and build a dream team.

The game offers a hero system where you can summon hundreds of heroes, even Athena, Morgana, and Loki, to join your team. You can also exchange heroes you don't like for other heroes, and you can choose the race. The gear system is abundant, ensuring numerous gears for every hero, and different gears have different attributes that affect heroes' skills. The dungeon will open gradually through challenges, and tons of gears and resources are available in it. Lastly, the Ragnarok mode offers a maze where your choices affect the destiny of your team, and you can either obtain numerous treasures or put your team in danger. Iron Shelter is a fun and exciting card game that offers a lot of content for free.