Games like I Had a Plan!
Games like I Had a Plan! include Inkbound, King Arthur: Knight's Tale, Fell Seal: Arbiter's Mark, Demeo, and FINAL FANTASY TACTICS - The Ivalice Chronicles. We matched them by the tags players give I Had a Plan! on Steam (Turn-Based Tactics, Strategy RPG, Tactical RPG, Fantasy, and 3D): closest matches first, and among equally close ones the better-known games.

Inkbound
Shared: Turn-Based Tactics · Tactical RPG · Strategy RPG

King Arthur: Knight's Tale
Shared: Turn-Based Tactics · Tactical RPG · Turn-Based Combat

Fell Seal: Arbiter's Mark
Shared: Turn-Based Tactics · Tactical RPG · Strategy RPG

Demeo
Shared: Turn-Based Tactics · Tactical RPG · RPG

FINAL FANTASY TACTICS - The Ivalice Chronicles
Shared: Turn-Based Tactics · Tactical RPG · Fantasy

Lost Eidolons: Veil of the Witch
Shared: Turn-Based Tactics · Tactical RPG · Roguelite

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

Legends of Kingdom Rush
Shared: Turn-Based Tactics · Tactical RPG · Strategy RPG

Tactics Ogre: Reborn
Shared: Turn-Based Tactics · Tactical RPG · Strategy RPG

Marvels Midnight Suns Digital Edition
Shared: Turn-Based Tactics · Tactical RPG · Strategy RPG

Black Book
Shared: Turn-Based Tactics · Dungeon Crawler · Strategy RPG

The Last Spell
Shared: Turn-Based Tactics · Tactical RPG · RPG

Mewgenics
Shared: Turn-Based Tactics · Roguelite · Turn-Based Combat

TROUBLESHOOTER: Abandoned Children
Shared: Turn-Based Tactics · Tactical RPG · Strategy RPG

Songs of Conquest
Shared: Turn-Based Tactics · Strategy RPG · Fantasy

Wildermyth
Shared: Turn-Based Tactics · Tactical RPG · Fantasy

Darkest Dungeon®
Shared: Dungeon Crawler · Turn-Based Combat · RPG

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

Swords and Sandals Immortals
Shared: Turn-Based Tactics · Strategy RPG · Turn-Based Combat

Clair Obscur: Expedition 33
Shared: Fantasy · Turn-Based Combat · RPG

Symphony of War: The Nephilim Saga
Shared: Tactical RPG · Fantasy · Strategy RPG

Solasta: Crown of the Magister
Shared: Fantasy · Strategy RPG · RPG

Baldur's Gate 3
Shared: RPG · Fantasy · Turn-Based Combat

Low Magic Age
Shared: Turn-Based Tactics · Turn-Based Combat · Dungeon Crawler