Games like Monster Destroyer
Games like Monster Destroyer include Bloons TD 6, Plants vs. Zombies GOTY Edition, The Last Spell, Into the Breach, and Rogue Tower. We matched them by the tags players give Monster Destroyer on Steam (Casual, Strategy, Turn-Based Strategy, Tower Defense, and Turn-Based Tactics): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

Plants vs. Zombies GOTY Edition
Shared: Strategy · Tower Defense · Casual

The Last Spell
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

Into the Breach
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

Rogue Tower
Shared: Strategy · Casual · Tower Defense

Kingdom Rush - Tower Defense
Shared: Strategy · Tower Defense · Casual

Warhammer 40,000: Battlesector
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

XCOM®: Chimera Squad
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

STAR WARS Zero Company™
Shared: Turn-Based Strategy · Turn-Based Tactics · Strategy

Plague Inc: Evolved
Shared: Strategy · Casual · Indie

The Battle of Polytopia
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

Kingdom Rush Frontiers - Tower Defense
Shared: Strategy · Tower Defense · Casual

Jagged Alliance 3
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

Kingdom Rush Origins - Tower Defense
Shared: Strategy · Tower Defense · Casual

Sid Meier’s Civilization® VI
Shared: Strategy · Turn-Based Strategy · Singleplayer

Rock 'N' Roll Defense
Shared: Strategy · Casual · Tower Defense

Game Dev Tycoon
Shared: Strategy · Casual · Indie

Dota Underlords
Shared: Strategy · Casual · Turn-Based Tactics

Dorfromantik
Shared: Casual · Turn-Based Strategy · Strategy

Bloons TD 5
Shared: Strategy · Tower Defense · Casual

XCOM: Enemy Unknown
Shared: Turn-Based Strategy · Strategy · Turn-Based Tactics

Warhammer 40,000: Mechanicus
Shared: Strategy · Turn-Based Tactics · Turn-Based Strategy

Wargroove
Shared: Strategy · Turn-Based Strategy · Turn-Based Tactics

Just Go
Shared: Casual · Strategy · Turn-Based Strategy