--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# A game abstraction for RPG.
+module game
+
+import rpg
+
+# This is the interface you have to implement to use ure gaming platform.
+#
+# see http://our.platform.com
+interface Game
+
+ # Characters played by human players.
+ fun player_characters: List[Character] is abstract
+
+ # Characters players by computer.
+ fun computer_characters: List[Character] is abstract
+
+ # Start the game.
+ #
+ # You have to implement that method!
+ fun start_game is abstract
+
+ # Pause the game.
+ #
+ # You have to implement that method!
+ fun pause_game is abstract
+
+ # Stop the game.
+ #
+ # You have to implement that method!
+ fun stop_game is abstract
+end
+