Deep Exploration
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Deep Exploration is a feature in the Integrated Strategies game mode introduced in Phantom & Crimson Solitaire, which is added at the respective themes' Expansion I.
Players can opt to perform a Deep Exploration run as long as they have completed a run in the Normal difficulty or higher at least once, which have various conditions that affects the gameplay in various ways, including certain restrictions. Each Deep Exploration also have their own Mission Objectives and rewards from achieving it (given at the end of the Deep Exploration run). Once a Deep Exploration run's Mission Objective is achieved regardless of the outcome, that Exploration will be marked as "Investigation Completed" and can be started again anytime.
The player will be able to start Deep Exploration runs where the player starts with certain Collectibles even if the said Collectibles haven't been unlocked yet, but the Exploration run's progression will not be counted to unlock new content in the I.S. theme (including the Collectibles) and its Path to Glory medals.