Is Outside the Lines multiplayer or co-op?

Yes — co-op and PvP, plus local/split-screen. Outside the Lines is a classic & campaign shooter game released in 2018, 82% positive on Steam (163 reviews). Free on Steam.

Steam tags: Free to Play, Casual, Indie, Action, Colorful, Pixel Graphics, Twin Stick Shooter, Multiplayer

Do you and a friend both own Outside the Lines?

Ready Up compares two Steam libraries and shows every multiplayer game you both have — including whether Outside the Lines 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 Outside the Lines you can play together

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

Quick answers

Is Outside the Lines co-op?

Yes, Outside the Lines supports co-op.

Does Outside the Lines have PvP?

Yes, Outside the Lines has player-versus-player modes.

How many people play Outside the Lines?

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