Games like Tower Doomer
Games like Tower Doomer include Teardown, Totally Accurate Battle Simulator, Garry's Mod, Goat Simulator, and BeamNG.drive. We matched them by the tags players give Tower Doomer on Steam (Destruction, Physics, Colorful, Casual, and Sandbox): closest matches first, and among equally close ones the better-known games.

Teardown
Shared: Destruction · Physics · Sandbox

Totally Accurate Battle Simulator
Shared: Sandbox · Physics · Simulation

Garry's Mod
Shared: Physics · Sandbox · Casual

Goat Simulator
Shared: Physics · Destruction · Simulation

BeamNG.drive
Shared: Physics · Destruction · Simulation

People Playground
Shared: Physics · Sandbox · Destruction

Besiege
Shared: Physics · Destruction · Sandbox

PowerWash Simulator
Shared: Casual · Simulation · Sandbox

DrainSim
Shared: Casual · Physics · Simulation

GoreBox
Shared: Physics · Sandbox · Casual

Hardspace: Shipbreaker
Shared: Physics · Destruction · Simulation

Slime Rancher
Shared: Colorful · Sandbox · Casual

Plague Inc: Evolved
Shared: Outbreak Sim · Simulation · Strategy

Placid Plastic Duck Simulator
Shared: Physics · Casual · Colorful

Brick Rigs
Shared: Destruction · Sandbox · Physics

Wobbledogs
Shared: Sandbox · Colorful · Simulation

Hozy
Shared: Casual · Sandbox · Physics

Turbo Dismount™
Shared: Physics · Destruction · Simulation

House Flipper
Shared: Simulation · Sandbox · Casual

Goat Simulator 3
Shared: Physics · Sandbox · Simulation

Poly Bridge
Shared: Physics · Simulation · Sandbox

Kill It With Fire
Shared: Destruction · Colorful · Simulation

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

Kerbal Space Program
Shared: Physics · Sandbox · Simulation