Games like Grid Forge TD
Grid Forge TD. These games share the most with it, and each one says why.

A Dungeon Is You - DemoUpdated
Also tower defense, planning
Reincarnated as a dungeon core, you lay out a maze of walls and floors, upgrade defenders and fit loot idols into a grid inventory.
2.8★ galaxy
Harvest King: Farm Defense TDUpdated
Also tower defense, planning
Merge vegetable defenders on rotating farm slots and manage water to fend off enemy waves, with resources building up while you are away.
50% idle
Zero Stress King: Idle DefenseUpdated
Also tower defense
A tower defense where you cannot lose: enemies charge your walls and fall into lava, and you spend the payout on defenders and a map-shaped skill tree.
87% steam3.6★ galaxy
OutholdUpdated
Also tower defense
A short tower defense run-based game where you spend collected resources in a large refundable skill tree between attempts.
4.4★ galaxy
The Board is YoursUpdated
Also planning
Buy chess squares and pieces and position them so defended pieces boost each other's output, with prestige perks that change your strategy.
97% steam4.2★ galaxy50% idle
World of Towers VS. Cubes
Also tower defense
Build towers and walls against waves of cubes across five worlds, mining crystals and spending loot in talent and soul trees and a workshop.
4.4★ galaxy
Desktop Defender
Also tower defense
A lone tower in the corner of your screen holds off waves while you work, dropping gear to equip and resetting runs for permanent ascension upgrades.
92% steam90% idle
LegendumUpdated
Also planning
Plan each day of a hero's life, auto-battle hordes and train skills before old age, carrying your soul forward to the next life.
4.6★ galaxy
Idle Loops: Squirrel Edition
Also planning
A reworked Idle Loops with a pet squirrel companion, new zones, new actions and a tutorial.
4.2★ galaxy
The Perfect Tower II
Also tower defense
Tower defence as an idle engine, plus factories, mining and an in-game scripting language.
87% steam60% idle
Abyss Manager Idle
Also tower defense
Assign characters to jobs, gather resources and dig deeper floors in an idle tower defense. About two hours to finish completely.
95% steamhas ending
Immortality Idle
Also planning
A cultivation-themed time management game: pick daily activities, die, and reincarnate with better aptitudes until you finally become immortal.
3.9★ galaxyhas ending
castle idlerUpdated
Also tower defense
A tower defense incremental without waves, where you place and upgrade towers against slimes and unlock a prestige skill tree across harder levels.
79% steam3.6★ galaxy
Increlution
Also planning
Live a life, die, and carry your skills into the next one. Queue-based planning with a proper story and a finish line.
85% steam40–100h ending60% idle
Sir, We Have an Orc Problem
Also tower defense
A short tower defense against orc armies in the tens of thousands, where every run, won or lost, feeds a big tree of turret upgrades.
86% steam
RefenceDormant
Also tower defense
Defend a wall with chosen heroes in a roguelike idle defense, building up your castle, researching features and crafting relics.
77% steam3.4★ galaxy
IncrediMarble
Also planning
Build large marble runs from 30 piece types in a physics sandbox, earning points from rolling marbles to expand the contraption further.
94% steam
Widget Inc.
Also planning
Craft widgets by hand, then automate and lay out a sprawling factory through twelve tech tiers on the way to building a rocket.
87% steamhas ending
ProductorUpdated
Also planning
Place buildings on tiles across a series of maps, each with three building tiers and a new mechanic.
4.0★ galaxy
Stuck In Time
Also planning
Plan action lists for each time loop, let them run, and refine routes through a pixel-art world as you work toward escape.
85% steamhas ending70% idle
All Aboard! The Train Defense Express
Also tower defense
Defend a power generator from waves of orcs with a looping train, buying combat and gold-making carriages and merging three alike to level them.
91% steam
Tiny TowersUpdated
Also tower defense
Defend a small fortress against waves of tiny monsters in an action-focused incremental.
4.1★ galaxy25% idleIdle Loops
Also planning
Plan a list of actions, run the loop, get stronger, plan a better loop. Pure optimisation; the Omsi fork is the one to play.
35% idle
Cavernous II
Also planning
Guide clones through a cave, pulling mana from strange rocks to reach deeper areas. A demanding puzzle game with a rough interface.
3.6★ galaxy