diff --git a/src/game/command.cr b/src/game/command.cr
index 69e5689..5fdc825 100644
--- a/src/game/command.cr
+++ b/src/game/command.cr
@@ -201,197 +201,4 @@ module Game
       tile.as?(BuildingTile)
     end
   end
-
-  # class BuildCrystalHarvesterCommand < Command
-  #   BUILD_TIME = 30
-
-  #   def initialize(@point : Point)
-  #   end
-
-  #   def start(world : World) : TimeSpan
-  #     tile = world.map.get(@point)
-  #     if !tile.can_build?
-  #       raise InvalidPlaceForBuilding.new
-  #     end
-  #     world.map.set(ConstructionSiteTile.new(@point))
-  #     BUILD_TIME
-  #   end
-
-  #   def finish(world : World)
-  #     world.map.set(CrystalHarvesterTile.new(@point))
-  #     world.push(HarvestCrystalCommand.new(@point))
-  #   end
-
-  #   def desc : String
-  #     sprintf "Build harvester site at %d,%d", @point.x, @point.y
-  #   end
-  # end
-
-  # class HarvestCrystalCommand < Command
-  #   HARVEST_VALUE = 80
-  #   HARVEST_TIME  = 10
-  #   REST_TIME     =  5
-
-  #   def initialize(@point : Point)
-  #     @value = 0
-  #   end
-
-  #   def start(world : World) : TimeSpan
-  #     deposit_tile = nearest_deposit(world)
-  #     stock_tile = nearest_stock(world)
-  #     if deposit_tile && stock_tile
-  #       wood_dist = @point.distance(deposit_tile.point)
-  #       stock_dist = @point.distance(stock_tile.point)
-  #       @value = deposit_tile.withdraw(HARVEST_VALUE)
-  #       HARVEST_TIME + 2 * wood_dist + 2 * stock_dist
-  #     else
-  #       REST_TIME
-  #     end
-  #   end
-
-  #   def finish(world : World)
-  #     world.resources.inc(Resources::Type::Crystals, @value)
-  #     world.push(HarvestCrystalCommand.new(@point))
-  #   end
-
-  #   def desc : String
-  #     sprintf "Harvest crystals at %d,%d", @point.x, @point.y
-  #   end
-
-  #   private def nearest_deposit(world : World)
-  #     # world.map.nearest_tile @point do |tile|
-  #     #   tile.has_role(TileRole::CrystalDeposits) && tile.cur > 0
-  #     # end
-  #   end
-
-  #   private def nearest_stock(world : World)
-  #     # world.map.nearest_tile @point do |tile|
-  #     #   tile.has_role(TileRole::Warehouse)
-  #     # end
-  #   end
-  # end
-
-  # class BuildCrystalRestorerCommand < Command
-  #   CRYSTALS_COST = 100
-  #   BUILD_TIME    =  50
-
-  #   def initialize(@point : Point)
-  #   end
-
-  #   def start(world : World) : TimeSpan
-  #     tile = world.map.get(@point)
-  #     if !tile.can_build?
-  #       raise InvalidPlaceForBuilding.new
-  #     end
-  #     world.resources.dec(Resources::Type::Crystals, CRYSTALS_COST)
-  #     world.map.set(ConstructionSiteTile.new(@point))
-  #     BUILD_TIME
-  #   end
-
-  #   def finish(world : World)
-  #     world.map.set(CrystalRestorerTile.new(@point))
-  #     world.push(RestoreCrystalCommand.new(@point))
-  #   end
-
-  #   def desc : String
-  #     sprintf "Build crystal restorer at %d,%d", @point.x, @point.y
-  #   end
-  # end
-
-  # class RestoreCrystalCommand < Command
-  #   RESTORE_TIME  = 15
-  #   RESTORE_VALUE = 30
-  #   REST_TIME     =  5
-
-  #   @target_tile : Tile | Nil = nil
-
-  #   def initialize(@point : Point)
-  #   end
-
-  #   def start(world : World) : TimeSpan
-  #     @target_tile = nearest_deposit(world)
-  #     if @target_tile
-  #       dist = @point.distance(@target_tile.as(Tile).point)
-  #       RESTORE_TIME + 2 * dist
-  #     else
-  #       REST_TIME
-  #     end
-  #   end
-
-  #   def finish(world : World)
-  #     if @target_tile
-  #       @target_tile.as(Tile).charge(RESTORE_VALUE)
-  #     end
-  #     world.push(RestoreCrystalCommand.new(@point))
-  #   end
-
-  #   def desc : String
-  #     sprintf "Restore crystals at %d,%d", @point.x, @point.y
-  #   end
-
-  #   private def nearest_deposit(world : World)
-  #     world.map.nearest_tile @point do |tile|
-  #       tile.has_role(TileRole::CrystalDeposits) && tile.cur < tile.cap
-  #     end
-  #   end
-  # end
-
-  # class BuildTerraformerCommand < Command
-  #   CRYSTALS_COST = 300
-  #   BUILD_TIME    = 120
-
-  #   def initialize(@point : Point)
-  #   end
-
-  #   def start(world : World) : TimeSpan
-  #     tile = world.map.get(@point)
-  #     if !tile.can_build?
-  #       raise InvalidPlaceForBuilding.new
-  #     end
-  #     world.resources.dec(Resources::Type::Crystals, CRYSTALS_COST)
-  #     world.map.set(ConstructionSiteTile.new(@point))
-  #     BUILD_TIME
-  #   end
-
-  #   def finish(world : World)
-  #     world.map.set(TerraformerTile.new(@point))
-  #     world.push(TerraformCommand.new(@point))
-  #   end
-
-  #   def desc : String
-  #     sprintf "Build terraformer at %d,%d", @point.x, @point.y
-  #   end
-  # end
-
-  # class TerraformCommand < Command
-  #   PRODUCTION_TIME  = 60
-  #   REST_TIME        = 20
-  #   PRODUCTION_VALUE =  5
-  #   CRYSTAL_REQUIRED = 50
-
-  #   def initialize(@point : Point)
-  #     @can_terr = false
-  #   end
-
-  #   def start(world : World) : TimeSpan
-  #     if world.resources.has(Resources::Type::Crystals, CRYSTAL_REQUIRED)
-  #       world.resources.dec(Resources::Type::Crystals, CRYSTAL_REQUIRED)
-  #       @can_terr = true
-  #       PRODUCTION_TIME
-  #     else
-  #       REST_TIME
-  #     end
-  #   end
-
-  #   def desc : String
-  #     "Terraform planet"
-  #   end
-
-  #   def finish(world : World)
-  #     if @can_terr
-  #       world.resources.inc(Resources::Type::Terraformation, PRODUCTION_VALUE)
-  #     end
-  #     world.push(TerraformCommand.new(@point))
-  #   end
-  # end
 end