Terrain

Maps are tile grids (one tile is 32 world pixels), and every tile has one terrain type. Terrain decides three things: who can enter a tile, how fast ground vehicles cross it, and whether a building can stand on it.

Terrain	Ground vehicles	Ships	Buildings	Notes
Grass, sand	✓	—	✓	The baseline.
Road	✓ 1.3× faster	—	✗	Lanes reward early map control; foundations cannot be placed on them.
Snow	✓ 0.82×	—	✓	Mild slowdown.
Rubble	✓ 0.72×	—	✓	Collapsed urban ground.
Mud	✓ 0.68×	—	✓	Punishes heavy columns.
Marsh	✓ 0.48×	—	✓	The slowest passable ground.
Forest	✗	—	✗	Blocks vehicles; aircraft fly over.
Rock	✗	—	✗	Ridges and cliffs.
Water, deep water	✗	✓	Naval Yard on the shoreline only	Ships only.
Lava	✗	✗	✗	Impassable to everything but aircraft.

Aircraft ignore terrain entirely. Submarines follow ship rules. Metal deposits sit on grass and take an Metal Extractor only.

Using it

• Chokepoints. Ridge chains and forest walls turn open maps into a few lanes. Two cannon turrets in a lane do the work of six in the open.
• Roads cut both ways. They speed your reinforcements and the enemy's raid. Buggies on a road cross a map before a tank column has formed up.
• Slow ground is a kill zone. An army wading through marsh under artillery fire takes twice the shells before it reaches anything.
• Flank by air and sea. A Pelican Transport Helicopter or Landing Craft ignores every wall a tank has to drive around.

Guarantees

Every map, generated or authored, is checked for connectivity before play: spawns and deposits stay drivable, on ground maps every spawn shares one landmass, and naval maps keep a single connected ocean. A move target a unit cannot reach is snapped to the nearest tile in its own region, so ships never chase inland ponds and tanks never queue against a cliff.