Mission 1

Mission 1 (Prologue, Mission 1) is one of the smallest maps (4x4) in TinyGroove (tied with the 4x4 map in Mission 9 [Chapter 4, Mission 1]). S-rank can be achieved if completed in < 10 days. The mission contains cut scenes at the beginning and end explaining that the player is taking on the role of Dark Mercia in an alternate version of Aurania, where Dark Mercia has been grievously injured and ultimately saved by her finding and relying on Requiem, with an odd side effect of claustrophobia, frequently referenced as 'the darkness' in the game. To represent this, Fog of War is in effect for every map, and as the player accumulates enchanted 'darkness-abating' artefacts in this version of Aurania, subsequent maps increase in size. The player acquires Artefact 'A', Heavensong's Golden Chalice in Mission 1 by destroying their Stronghold.

The map also contains a signpost adjacent to the bottom left corner with Floran scripts of relevance to the final map. It can be translated once the cipher Artefact 'X' is in your possession. Finally, there is an alternate way to win this map that unlocks Mission 22, revealed later in the game. All of this information was gleaned from the in-game spoilers unlocked in the Achievement Castle by completing at least 20% of the game and destroying the red gates comprising the 'Campaign Completion Counter'.

Achievements: 

A2: First Victory

Conditions: Win the map by rout (destroying all enemy units and structures).

A5: Personal Pointed Precipitation

Conditions: Destroy the enemy Stronghold in < 15 days using while recruiting only 1 archer.