Add vehicle classes

specs/gameplay.md

@@ -131,6 +131,38 @@ Energy consumption : high
 Can cross water : yes
 Can cross mountain : yes
 
+### Class
+
+Some vehicule categories.
+
+#### Buggy
+
+Tiniest vehicule to discover the game.
+
+- 4 movers
+- 3 slots
+
+#### Discoverer
+
+Small vehicule.
+
+- 6 movers
+- 6 slots
+
+#### Cruiser
+
+High class vehicule.
+
+- 8 movers
+- 12 slots
+
+#### Cargo
+
+Huge vehicule.
+
+- 10 movers
+- 24 slots
+
 ## Exploration phase
 
 ### Biomes