Games like Gem Tower Defense 2
Games like Gem Tower Defense 2 include Bloons TD 6, Rogue Tower, Kingdom Rush - Tower Defense, Plants vs. Zombies GOTY Edition, and Legion TD 2 - Multiplayer Tower Defense. We matched them by the tags players give Gem Tower Defense 2 on Steam (Strategy, Tower Defense, Board Game, Dungeon Crawler, and Auto Battler): closest matches first, and among equally close ones the better-known games.

Bloons TD 6
Shared: Strategy · Tower Defense · Casual

Rogue Tower
Shared: Strategy · Tower Defense · Casual

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

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

Legion TD 2 - Multiplayer Tower Defense
Shared: Tower Defense · Strategy · Auto Battler

Thronefall
Shared: Strategy · Tower Defense · 3D

Dungeon of the ENDLESS™
Shared: Strategy · Tower Defense · Dungeon Crawler

Emberward
Shared: Tower Defense · Strategy · Roguelite

Isle of Arrows
Shared: Tower Defense · Strategy · Board Game

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

Cluckmech Oasis
Shared: Strategy · Tower Defense · Roguelite

Kingdom Rush 5: Alliance TD
Shared: Strategy · Tower Defense · Cartoon

Zero Stress King: Idle Defense
Shared: Tower Defense · Strategy · Auto Battler

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

Rento Fortune: Online Dice Board Game (大富翁)
Shared: Strategy · Board Game · Casual

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

Legend Creatures(传奇生物)
Shared: Strategy · Auto Battler · Roguelite

Time Walker: Dark World
Shared: Auto Battler · Strategy · Roguelite

Tiny Tactics
Shared: Strategy · Tower Defense · 3D

Relic Guardian - Tower Defense
Shared: Strategy · Tower Defense · Casual

Darkest Dungeon® II
Shared: Dungeon Crawler · Turn-Based Tactics · Roguelite

Endgame of Devil
Shared: Strategy · Casual · Board Game

Wall World
Shared: Tower Defense · Strategy · Roguelite

How Many Dudes? The Roguelike Autobattler
Shared: Strategy · Casual · Dungeon Crawler