There's a card that makes grenades not bounce, and it's exactly as strong as you'd expect with the fire grenade shotgun. It also gives +1 grenade, and it works at any range, even if there would otherwise be two bounces.
Special thanks to the mod creator Etilon, who also credits the following people:
Rose, Starblaze, Awg4, Maya!, Glacies, JP12, TheColorKingTCK, and me
Check out the Shotgun King discord:
/ discord
00:00 first attempt
03:46 second attempt
03:35 floor 2
05:44 floor 3
08:39 floor 4
12:16 floor 5
15:20 floor 6
18:06 floor 7
20:34 floor 8
21:48 floor 9
22:46 floor 10
24:13 floor 11
25:46 boss
Shotgun King: the Final Checkmate
store.steampowered.com/app/19...