The Missing Expedition: How to Solo Play Lost Ruins of Arnak
By Czech Games Edition | Published: 2026-09-07
Category: How-to Guides
Learn how to play Lost Ruins of Arnak solo with the Missing Expedition expansion. Step-by-step setup and rules for a rewarding single-player experience.
Quick Answer
To play Lost Ruins of Arnak solo with The Missing Expedition, set up the game as usual, then add the solo-specific components from the expansion. Follow the solo rules included in the expansion booklet, which introduce a rival expedition that you race against. The expansion also adds two new leaders and research tracks, giving solo players fresh strategic options.

Lost Ruins of Arnak is a beloved exploration and deck-building game, and The Missing Expedition expansion adds a rich solo mode. If you're looking to play alone, this guide walks you through the setup and rules so you can enjoy the adventure without a group.
The expansion not only introduces a solo variant but also adds two new leaders and research tracks. These elements make solo play more varied and challenging, ensuring each expedition feels unique.
What's in The Missing Expedition?
The Missing Expedition includes components for solo play, such as a rival expedition board and special cards. It also adds two new leaders and two research tracks, which are usable in both solo and multiplayer games. These additions test your strategic flexibility and keep the base game fresh.
When playing solo, you'll compete against a simulated opponent that follows a specific pattern. This rival progresses on its own, forcing you to balance exploration, resource management, and racing for key locations.
- Check the expansion box for the solo rulebook—it contains all the specific rules you need.
- The new leaders and research tracks can be mixed with the base game components.
Setting Up for Solo Play
Start by setting up the base game as you normally would, but remove any components that are not used in solo play (the expansion rulebook lists these). Then, add the solo-specific components: the rival expedition board, its marker, and the solo cards.
Choose one of the two new leaders or one from the base game. Each leader offers a different starting ability, so pick one that suits your preferred strategy. Shuffle the new research tracks into the deck as instructed.
Place the rival expedition marker on its starting space on the rival board. The setup is quick once you've done it a few times, and it ensures a balanced challenge.
- Common mistake: Forgetting to remove the solo-excluded cards from the base game—this can unbalance the deck.
- Checkpoint: Verify that the rival's starting position and the number of solo cards match the player count (1).
Solo Rules Overview
In solo play, you take turns as normal, but after your turn, the rival expedition activates. The rival moves along its own track, gaining resources and discovering sites based on simple rules. You must decide whether to focus on your own progress or block the rival by claiming key locations first.
The game ends when you have completed a certain number of rounds or when the rival reaches a specific point. Your final score is compared to a target score that depends on the difficulty level you choose. The expansion includes multiple difficulty settings, so you can adjust the challenge.
- Pay attention to the rival's movement—it can trigger events that affect your options.
- Common mistake: Ignoring the rival's actions while focusing solely on your own engine—this often leads to a loss.
Step-by-Step Solo Play Setup
- Prepare the Base Game: Set up Lost Ruins of Arnak according to the base rules, but remove any cards or components that the expansion rulebook marks as not used in solo play. This ensures the deck is balanced. Checkpoint: Double-check that you've removed the correct cards to avoid an overpowered deck.
- Add Expansion Components: Place the rival expedition board nearby and set its marker to the starting position. Shuffle the solo cards and create a draw pile. Add the new leaders and research tracks to the available options. Common mistake: Forgetting to shuffle the solo cards thoroughly can lead to predictable rival behavior.
- Choose Your Leader and Difficulty: Select a leader (new or base) and decide on a difficulty level. The expansion offers several difficulty settings, each with a different target score. Start with a lower difficulty if you're new to solo play. Checkpoint: Ensure you know the target score for your chosen difficulty to avoid confusion later.
- Play Your Turns: On your turn, take actions as normal: explore, buy cards, and fight guardians. After your turn, activate the rival according to the solo rules. The rival will move and possibly claim sites, so plan your moves to stay ahead. Common mistake: Underestimating the rival's speed can leave you without key resources. Keep an eye on its position.
- End Game and Score: The game ends when the round marker reaches the end or the rival triggers the end condition. Count your victory points and compare them to the target score. If you meet or exceed it, you win! Checkpoint: Review your score to see which strategies worked, and adjust for your next solo attempt.
Product Facts
- Lost Ruins of Arnak: The Missing Expedition: The Missing Expedition is a new expansion for Lost Ruins of Arnak. Test the strategies offered by two new leaders. Explore new paths to knowledge on two new research tracks. This expansion is essential for solo play as it includes the official solo rules and components. The new leaders and research tracks also add variety to your solo games.
Playing Lost Ruins of Arnak solo with The Missing Expedition offers a challenging and rewarding experience. By following the steps above, you'll be ready to embark on a solo adventure. Remember to adapt your strategy based on the rival's actions, and don't forget to explore the new leaders and research tracks for added depth.

