Single-player games like Monster Mercs
Below are 8 single-player Steam games similar to Monster Mercs, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Monster Mercs page.
Ranked picks
- 1

Ascent Of Eternity
Single-player alternative to Monster Mercs — playable solo, no multiplayer required. Shares Action and RPG with Monster Mercs.
ASCENT OF ETERNITY™ is an action-rpg rogue-like magical horde-slaying third person coop game. Fire, Ice, Electric, Light, Dark, Metal, and Life. The 7 elements call for mastery. Master the elements and ascend through eternity!
- 2

Kharvalen
Single-player alternative to Monster Mercs — playable solo, no multiplayer required. Shares Action and RPG with Monster Mercs.
Survive relentless hordes of creatures in Kharvalen. Choose a race, equip your weapon set, and combine unique upgrades, runes, artifacts, and loot each run to create devastating builds. Play co-op or PvP with your friends!
- 3

Above Land: Rhapsody
Single-player alternative to Monster Mercs — playable solo, no multiplayer required. Shares Action and RPG with Monster Mercs.
A chaotic 1-3 player co-op action roguelite above the clouds. Grab a toy. Save the world.
- 4

Riftbound Survivors
Single-player alternative to Monster Mercs — playable solo, no multiplayer required. Shares Action and RPG with Monster Mercs.
Riftbound is a survivor-like bullet heaven focused on spell combinations and massive enemy waves. Defeat thousands of enemies, experiment with elemental chain reactions, and break the game with overlapping status effects. Play solo or in co-op.
- 5

Black Hollow
Single-player alternative to Monster Mercs — playable solo, no multiplayer required. Shares Action and RPG with Monster Mercs.
Become the doctor the plague fears. Battle infected hordes solo or in up to four-player online co-op in this first-person dark fantasy roguelite. Harvest ichor, unleash volatile alchemy, and forge monstrous builds across four haunted hunting grounds.
- 6

Perihelion
Single-player alternative to Monster Mercs — playable solo, no multiplayer required. Shares Action and RPG with Monster Mercs.
Master orbital combat and bend gravity to your advantage in this space combat roguelite. Launch from your carrier, tackle tactical missions, build crew relationships, and upgrade your ship between runs as you slowly unravel the mystery of a lost sister ship.
- 7

Dungeon Wanderers
Single-player alternative to Monster Mercs — playable solo, no multiplayer required. Shares Action and RPG with Monster Mercs.
A 3D action RPG in a dungeon that changes each time you dive in. Read enemy attacks and answer with guards, parries, and dodges. Your playstyle shapes which skills awaken in you. Capture monsters and raise them as companions to fight by your side. Play solo or in up to 4-player online co-op.
- 8

33 Immortals
Single-player alternative to Monster Mercs — playable solo, no multiplayer required. Shares Action with Monster Mercs.
33 Immortals is a co-op action-roguelike for 33 players. Jump straight into runs, solo or with friends. Battle hordes of monsters, defeat massive bosses, and grow stronger each run. Use in-game emotes to coordinate and combine powers with your fellow rebels, and face the Wrath of God, together.