Games like Idle Dot Shooter!
Idle Dot Shooter!. These games share the most with it, and each one says why.

War Tortoise 2Dormant
Also idle, incremental, combat
Pilot a heavily armed tortoise tank across a large world, gearing up with loot, pilots and heroes.

Spirit Dungeons: Legacy
Also incremental, idle, combat
A defeated necromancer rebuilds an undead army and turns righteous in this tiny js13k incremental.
3.7★ galaxy75% idle
Celestial ForgeUpdated
Also incremental, idle, space
Generators orbit a core and fire mass into it to build worlds, then you forge stars to earn relics.
2.4★ galaxy
Unnamed Space Idle
Also space, combat
A ship, a sector map and a tidy prestige loop. Quietly one of Galaxy's most-played games.
92% steam4.5★ galaxy70% idle
Ancient Russian Life Simulator
Also combat, incremental
A meme-heavy clicker where ancient warriors fight lizards, learn absurd techniques from a skill tree and sacrifice their foes for blessings.
95% steam
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
Vanguard Galaxy
Also space, combat
Fight, mine, salvage and trade across a procedural galaxy, played full screen or docked on your desktop with an autopilot that can run things.
90% steam50% idle
Astro Prospector Prologue
Also space, combat
A bullet-heaven incremental where you mine coffee asteroids, fight SpaceCorp and upgrade your ship. This build is an early prologue.
4.6★ galaxy
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
IncreKnight
Also combat, incremental
A knight fights through a dragon's lair, selling monster loot for skills, spells and weapons until he can face the dragon. Brief and focused.
88% steamhas ending
Pacifish
Also idle, 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
SPACE / MECH / PILOT
Also space, combat
Pilot a mech through space, defeating foes for XP and bigger numbers in a tongue-in-cheek idle RPG clicker.
85% steam
IGNOBLE
Also combat, incremental
Timed runs where you slaughter enemies for blood and bones, then spend the haul on a growing skill tree and a deck of ability cards.
83% steam
Forge MasterDormant
Also idle, combat
Forge gear across eras from the Stone Age to the Quantum Age and battle other players on a leaderboard.

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.

Invincible: Guarding the GlobeUpdated
Also combat, idle
Recruit characters from Invincible, merge clones to rank them up, and run idle battles in the background.
75% idle
Gun IdleUpdated
Also idle, combat
Own a shooting range where you unlock dozens of guns, blast breakable targets and stack earnings multipliers into the trillions.

Street Fighter Duel - Idle RPGUpdated
Also idle, combat
Recruit famous Street Fighter characters into a team that keeps getting stronger while you are away.

Epic Stickman: RPG Idle WarUpdated
Also idle, combat
Guide a stickman hero through a shadowy realm, picking a class and gaining power in automatic fights even offline.
75% idle
TerraGenesis - Space SettlersUpdated
Also idle, space
Terraform real and fictional planets using NASA data, building habitats and choosing among four factions.

Hero Making Tycoon Idle GamesDormant
Also idle, combat
Mass produce potato men on a factory line, arm them into soldiers and send them against huge bosses.

Merge Gun: Shoot ZombieDormant
Also idle, combat
Combine identical guns into stronger ones and use them to hold off waves of zombies.

Battle Simulator: Idle WarfareUpdated
Also idle, combat
Recruit fighters from many eras, from Spartans to helicopters, and watch them clash in automatic battles.

Idle Breaker: Zombie SurvivalUpdated
Also idle, combat
Smash through buildings for materials in a zombie wasteland and craft stronger weapons to defend your shelter.