My 12k by 12k survival/adventure map is out! It features 300 unique structures, 13 custom villages, dungeons, puzzles, a fast travel system, special weapons, and more! Download in the comments : r/Minecraft
1.12] Two-Player Co-Op Map: The Twist Labs [Puzzle] [Adventure] - Maps - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum
Best Multiplayer Minecraft Adventure Maps
CO-OP] Two For One (241) (updated to 1.14!) 300K+ downloads - Maps - Mapping and Modding: Java Edition - Minecraft Forum - Minecraft Forum
Friends Are Forever v1.2 (Co-op Puzzle Map) Minecraft Map