Is Interloper multiplayer or co-op?

Yes — online multiplayer. Interloper is a real-time strategy game released in 2015, 84% positive on Steam (399 reviews). Free on Steam.

Steam tags: Strategy, Indie, RTS, Multiplayer, Fast-Paced, Short, Great Soundtrack, 2D

Do you and a friend both own Interloper?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Interloper is one of them — then helps you pick tonight's game with a weighted roll or a bracket.

Or open the Steam store page.

Games like Interloper you can play together

Tired of Interloper? The Swap tab finds the closest unowned games of the same type that are newer or rated higher.

Quick answers

Is Interloper co-op?

Interloper does not list co-op on Steam; it has Online multiplayer, Single-player too.

Does Interloper have PvP?

Steam does not list PvP for Interloper.

How many people play Interloper?

Player counts were not available when this page was built.

Ready Up is a free tool: enter two Steam usernames and it lists the multiplayer games you both own, runs a bracket to pick one, and suggests new co-op games that fit how you both play. Ratings, tags and player counts from Steam and SteamSpy; page updated 2026-09-09. Powered by Steam — not affiliated with or endorsed by Valve Corporation or Microsoft. How the data works · Legal & privacy · All types · Game Pass