A great number for a great game.
Enter the Gungeon

Dodge Roll Games announced today that their game, Enter the Gungeon, has now surpassed 3 million copies sold. For those of you who don't know what Enter the Gungeon is, think of it as a mashup of a bullet hell with a dungeon crawler with a healthy dose of roguelike included.

There is a lot of replayability with the game, with tons of weapons and items to unlock, secrets to find, multiple characters to discover, and even multiple "endings" per character. It's quite fun and challenging and it's really no surprise that it has sold well. It also has an amazing soundtrack.

Enter the Gungeon is the legendary bullet hell dungeon crawler that follows a band of misfits who seek to shoot, loot, dodge roll and table-flip their way to personal absolution: the gun that can kill the past. Very few have accomplished this feat, and yet, the Gungeon remains.
According to the celebratory tweet, their arcade exclusive House of the Gundead is coming soon. This is a lightgun dungeon crawler made in collaboration with Griffin Aerotech. People still make classic arcade games? Yup, apparently!

lso, the Exit the Gungeon game will arrive on PC and consoles early this year. It's apparently already available for the Apple Arcade. Exit the Gungeon is billed as a "bullet hell dungeon climber" that follows the events of Enter the Gungeon. Also, there are hats.

Exit the Gungeon is a bullet hell dungeon climber immediately following the adventures of the misfit ‘Gungeoneers’ and their journey for personal absolution in Enter the Gungeon. Armed with an ever-changing weapon, an insatiable need to loot, and the trusty dodge roll, each of our heroes must ascend and escape via their own unique route of increasingly perilous elevators. Shifting rooms, enemies, bosses, bizarre weapons and items all combine to ensure that no two attempts to Exit the Gungeon are the same.