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

Pacifish
Also idle, crafting, combat
Fish six areas, fight back against what you disturb, hatch and eat fish for stats, and craft poles, playable idly or actively for speed.
84% steam50% idle
Idle Breaker: Zombie SurvivalUpdated
Also idle, combat, crafting
Smash through buildings for materials in a zombie wasteland and craft stronger weapons to defend your shelter.

Last Stronghold: Idle SurvivalUpdated
Also idle, crafting, combat
Build a base after a nuclear zombie outbreak, crafting supplies, recruiting survivors and clearing out the undead.

Milky Way Idle
Also mmo, crafting, combat
A multiplayer RPG with RuneScape-style gathering, production, and combat skills, repeating actions automatically, plus a player market and chat.
3.7★ galaxy70% idle
Idle Galaxy
Also crafting, combat, mmo
One persistent ship across ten planets: mine, fight, craft gear and trade with other players. A playable beta, updated often.
85% idle
Idle Atomic
Also crafting, combat, idle
An idle RPG set in a post-apocalyptic wasteland: fight mutants, salvage scrap, refine it into materials and craft permanent upgrades, spells and companions.
61% steam
Lootun
Also crafting, combat
Send up to three adventurers into dungeons while you salvage, craft and enchant their loot, choosing from four classes with ascendancies.
94% steam50% idle
修仙小屋
Also mmo, idle
A multiplayer text-based cultivation idler built for chatting at work, with gear, training maps, a cave dwelling and a player market.
92% steam
Progress Game
Also combat, crafting
Fight monsters, gather materials and cook, then craft three tiers of gear across two worlds. Built to run in the background while you check in for quick upgrades.
92% steam70% idle
Marisa!ReturnTheBook!
Also idle, combat
A Touhou fan game where you craft Shanghai dolls styled after Gensokyo characters to storm Marisa's house and recover her borrowed books.
90% steam
Idle ClansUpdated
Also mmo, crafting
A multiplayer idle RPG where you pick a task and your character trains around 20 skills even while you are offline, with a player economy and clans.
74% steam75% idle
The Climb - Demo
Also crafting, combat
Demo of an incremental RPG about climbing a monster-filled tower, with crafting, growing equipment, enchant cards, quests, and automatic combat.
4.5★ galaxy50% idle
Scapewatch: Idle MMO
Also mmo, idle
Queue tasks across 30 skills, close the tab, and your character keeps gathering, fighting and training offline. Clans, raids and hiscores round out the grind.
88% steam75% idle
Slimeward
Also combat, idle
Turn a slime that landed outside your house into resources, building up a village and recruiting heroes strong enough to beat it.
89% steam
Farm RPGDormant
Also mmo, crafting
A menu-based farming MMO where you grow crops, fish, craft and explore, trading and teaming up with other players.
88% steam
Dungeon Team
Also mmo, combat
Build squads of ASCII-drawn heroes from 11 classes and 8 skill trees, send them on an idle dungeon crawl, and fight other players in live or async arenas.
88% steam
Alien Invasion: RPG Idle SpaceUpdated
Also combat, idle
Guide an alien that eats humans to grow stronger, evolve its abilities and beat bosses in new locations.

Archer Forest : Idle DefenseUpdated
Also idle, combat
Defend a forest with animal archers by merging arrows into stronger ones, clearing stages, and beating bosses for loot.

Arkcraft - Idle AdventureUpdated
Also idle, crafting
Grow a castaway raft into a huge floating ark, adding rooms, docks, and defenses while the crew keeps gathering and processing materials while you are away.
75% idle
Battle Simulator: Idle WarfareUpdated
Also idle, combat
Recruit fighters from many eras, from Spartans to helicopters, and watch them clash in automatic battles.

Blacksmith - Merge Idle RPGDormant
Also crafting, idle
Merge weapons into over 81 new designs, use runes to multiply gold and duplicate items, and reset for Soul Gems when progress slows.

Clicker Heroes - Idle SlayerUpdated
Also idle, combat
Tap to fight waves of monsters and recruit a team of heroes with their own abilities, in the mobile version of a long-running idle RPG.

Deep Town: Mining Idle GamesDormant
Also idle, crafting
Mine resources below ground and craft them above into jewelry, chemicals, and plants, linking buildings into production chains run by bots.

Demigod Idle: Rise of a legendDormant
Also idle, combat
Play a demigod stripped of angelic and demonic power, regaining it through fast idle growth and flashy 2.5D battles.