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Cover of System Protocol One

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Games like System Protocol One

2010PC

A retro-inspired tower defense game for PC where smart placement and planning of defenses is the core. The presentation is deliberately simple and nostalgic.

  • Pixel art
  • Tactical depth
＋ Combine with my games

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More in these topics: Pixel art games

In short: Games like System Protocol One

Each of these 10 games shares something of what makes System Protocol One special. The reasons are listed right on each game.

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Your recipe: Systems ×3
Not for me Exclude horror, turn-based combat, pixel art …

Games where this is clearly part of it are left out, no matter how well the rest fits.

Horror Turn-based combat High difficulty Roguelike runs Shooter Pixel art Grind Survival PvP Open world Card game

10 games with a similar feel, sorted by match · How is this calculated?

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Best match

Super Sanctum TD

85 %Match

2013PC, Steam Deck playable85 % positive−80 % 4.99 € 0.99 €

Fits your focus: Systems like System Protocol One.

A retro-styled tower defense where you build mazes and place towers to keep alien hordes away from the Core. Active abilities like Air Strike and Freeze add extra dynamism to the battles.

Where to buy

  • Steam Best price PC · 2 days left 0.99 € 4.99 € −80 % Go to shop
  • Gamesplanet* Steam key 4.99 € Go to shop

* Affiliate link. Prices are synced regularly and may have changed in the shop since.

Similar games →

Spacejacked

  • Systems like System Protocol One

A frantic arcade tower-defense hybrid where you build turrets and shoot aliens yourself while juggling the defense of several rooms at once.

Planet TD

  • Systems like System Protocol One

A compact tower defense game where you use six tower types to defend the solar system against drones, tanks and air vehicles. Four planets with distinct traits add some variety.

Fieldrunners

  • Systems like System Protocol One

A classic tower defense game where you defend fields with upgradeable towers against waves of ground and air enemies. It offers accessible yet tactically deep tower placement and plenty of replayable challenges.

Defense Grid: The Awakening

  • Systems like System Protocol One

A classic tower defense game where you protect power cores from waves of alien insectoids. Smart placement and upgrading of ten tower types on fixed build pads, plus a dry-witted AI narrator, define the experience.

Defense Grid 2

  • Systems like System Protocol One

A classic tower defense game where smart tower placement and upgrades hold off waves of alien invaders. A campaign plus co-op and PvP modes add plenty of variety.

Cubetractor

  • Systems like System Protocol One

A retro-styled top-down blend of action, strategy and puzzles where you pull cubes toward you and turn them into turrets to beat enemy waves, like a reverse tower defense mixed with bullet-hell dodging.

Kittypocalypse

  • Systems like System Protocol One

A VR-exclusive tower defense game where you fend off hordes of alien kitties to save your home planet. A quirky premise meets strategic placement of defenses across varied environments.

War in a Box: Paper Tanks

  • Systems like System Protocol One

A tower defense game where you place and upgrade paper turrets inside a toy-box style 3D setting to stop both ground and air units. The papercraft look gives the genre a charming twist.

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