Single-player games like Portal Sentinels
Below are 9 single-player Steam games similar to Portal Sentinels, 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 Portal Sentinels page.
Ranked picks
- 1
Pyrewarden
Single-player alternative to Portal Sentinels — playable solo, no multiplayer required. Shares Strategy with Portal Sentinels.
A real-time fantasy tower defense where adjacency matters. Master 12 magic schools, blend them through 66 unique synergies, and defend across 21 distinct maps. 144 tower variants, deep upgrade trees, endless wave escalation. Play solo or in online co-op.
- 2
A Psychopomp Besieged
Single-player alternative to Portal Sentinels — playable solo, no multiplayer required. Shares Strategy with Portal Sentinels.
A strategic wave defence game about guiding and protecting souls on their journey through the underworld. Conjure and enchant magical towers to repel invaders that bleed into the worlds between life and the beyond.
- 3
Break Of Dawn
Single-player alternative to Portal Sentinels — playable solo, no multiplayer required. Shares Strategy with Portal Sentinels.
A hex-grid tower defense deck builder. Every card places a building, every rank is paid for in enemies taken alive or destroyed in battle, and between waves you pick which enemy type joins the army marching on you. Thirty waves, ten lives, and one tower per run that you can crown.
- 4
Witchtower: Spell Siege
Single-player alternative to Portal Sentinels — playable solo, no multiplayer required. Shares Strategy with Portal Sentinels.
Hand-aim artillery spells, blast a gothic horde into fully simulated pixel gore, and draft 200+ upgrade cards between waves to defend your witchtower. A fast 2D roguelite tower defense. Play solo or in local co-op.
- 5
Feed The Lone Bastion
Single-player alternative to Portal Sentinels — playable solo, no multiplayer required. Shares Strategy with Portal Sentinels.
An Incremental-Ish game about evolving The Bastion.
- 6
Defense of Wancotte
Single-player alternative to Portal Sentinels — playable solo, no multiplayer required. Shares Strategy with Portal Sentinels.
Build your own towers from modular units, adapt mid battle, and master custom defenses in this Build-a-Tower Defense.
- 7
Deephold
Single-player alternative to Portal Sentinels — playable solo, no multiplayer required. Shares Strategy with Portal Sentinels.
A tactical dwarven tower defense. Forge runes onto 7 tower types, unlock commander skills, and hold your gates through 12 campaign levels and an endless gauntlet. No ads, no micro-transactions, no always-online. Buy once, play forever.
- 8
Waveguard
Single-player alternative to Portal Sentinels — playable solo, no multiplayer required. Shares Strategy with Portal Sentinels.
A roguelike tower defense where every run reshapes your strategy. Build your team of towers, combine more than 80 artifacts, and explore a pixel-art world while taking on ever tougher challenges and bosses.
- 9
The Nightwatch
Single-player alternative to Portal Sentinels — playable solo, no multiplayer required.
Fight your way through hordes of monsters in this challenging 2D roguelite. Explore the dark rooms of the wizard tower, unearth and make the most out of the upgrades, talent trees and items available to push through the attack.