Games like Fireworks Mania - An Explosive Simulator
Games like Fireworks Mania - An Explosive Simulator include Garry's Mod, People Playground, Teardown, Scrap Mechanic, and Brick Rigs. We matched them by the tags players give Fireworks Mania - An Explosive Simulator on Steam (Sandbox, Multiplayer, Singleplayer, Building, and Exploration): closest matches first, and among equally close ones the better-known games.

Garry's Mod
Shared: Sandbox · Multiplayer · Building

People Playground
Shared: Sandbox · Physics · Singleplayer

Teardown
Shared: Sandbox · Multiplayer · Physics

Scrap Mechanic
Shared: Sandbox · Building · Multiplayer

Brick Rigs
Shared: Sandbox · Multiplayer · Building

Space Engineers
Shared: Sandbox · Building · Multiplayer

House Flipper
Shared: Singleplayer · Multiplayer · Sandbox

Fun with Ragdolls: The Game
Shared: Sandbox · Physics · Building

Goat Simulator
Shared: Sandbox · Funny · Physics

Totally Accurate Battle Simulator
Shared: Sandbox · Singleplayer · Funny

Just Cause™ 3
Shared: Multiplayer · Singleplayer · Sandbox

PEAK
Shared: Multiplayer · Exploration · Physics

RV There Yet?
Shared: Multiplayer · Funny · Physics

BeamNG.drive
Shared: Sandbox · Physics · Multiplayer

Kerbal Space Program
Shared: Sandbox · Physics · Building

Terraria
Shared: Sandbox · Multiplayer · Building

LEGO® Worlds
Shared: Sandbox · Multiplayer · Building

Slime Rancher
Shared: Singleplayer · Exploration · Sandbox

Besiege
Shared: Sandbox · Physics · Building

Gang Beasts
Shared: Multiplayer · Funny · Physics

Human Fall Flat
Shared: Multiplayer · Sandbox · Funny

Goat Simulator 3
Shared: Sandbox · Physics · Exploration

Grand Theft Auto V Legacy
Shared: Multiplayer · Action · Singleplayer

Kerbal Space Program 2
Shared: Sandbox · Building · Exploration