diff --git a/src/ship/room.rs b/src/ship/room.rs
new file mode 100644
index 0000000..982c0c1
--- /dev/null
+++ b/src/ship/room.rs
@@ -0,0 +1,148 @@
+use std::convert::{From, Into, TryFrom, TryInto};
+
+#[derive(Debug)]
+pub enum RoomCreationError {
+    InvalidMode,
+    InvalidEpisode(u8),
+    InvalidDifficulty(u8),
+
+}
+
+#[derive(Debug)]
+pub enum Episode {
+    One,
+    Two,
+    Four,
+}
+
+impl TryFrom<u8> for Episode {
+    type Error = RoomCreationError;
+
+    fn try_from(value: u8) -> Result<Episode, RoomCreationError> {
+        match value {
+            0 => Ok(Episode::One),
+            1 => Ok(Episode::Two),
+            2 => Ok(Episode::Four),
+            _ => Err(RoomCreationError::InvalidEpisode(value))
+        }
+    }
+}
+
+impl Into<u8> for Episode {
+    fn into(self) -> u8 {
+        match self {
+            Episode::One => 1,
+            Episode::Two => 2,
+            Episode::Four => 3,
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum Difficulty {
+    Normal,
+    Hard,
+    VeryHard,
+    Ultimate,
+}
+
+impl TryFrom<u8> for Difficulty {
+    type Error = RoomCreationError;
+
+    fn try_from(value: u8) -> Result<Difficulty, RoomCreationError> {
+        match value {
+            0 => Ok(Difficulty::Normal),
+            1 => Ok(Difficulty::Hard),
+            2 => Ok(Difficulty::VeryHard),
+            3 => Ok(Difficulty::Ultimate),
+            _ => Err(RoomCreationError::InvalidDifficulty(value))
+        }
+    }
+}
+
+impl Into<u8> for Difficulty {
+    fn into(self) -> u8 {
+        match self {
+            Difficulty::Normal => 0,
+            Difficulty::Hard => 1,
+            Difficulty::VeryHard => 2,
+            Difficulty::Ultimate => 3,
+        }
+    }
+}
+
+#[derive(Debug)]
+pub enum RoomMode {
+    Single {
+        episode: Episode,
+        difficulty: Difficulty,
+    },
+    Multi {
+        episode: Episode,
+        difficulty: Difficulty,
+    },
+    Challenge {
+        episode: Episode,
+    },
+    Battle {
+        episode: Episode,
+        difficulty: Difficulty,
+    }
+}
+
+
+#[derive(Debug)]
+pub struct RoomState {
+    mode: RoomMode,
+    name: [u16; 16],
+    password: [u16; 16],
+    pub maps: [u32; 0x20],
+    // drop_table
+    // items on ground
+    // enemy info
+}
+
+impl RoomState {
+    /*fn new(mode: RoomMode) -> Room {
+        Room {
+            mode: mode,
+        }
+    }*/
+
+    pub fn from_create_room(create_room: &libpso::packet::ship::CreateRoom) -> Result<RoomState, RoomCreationError> {
+        if [create_room.battle, create_room.challenge, create_room.single_player].iter().sum::<u8>() > 1 {
+            return Err(RoomCreationError::InvalidMode)
+        }
+        
+        let room_mode = if create_room.battle == 1 {
+            RoomMode::Battle {
+                episode: create_room.episode.try_into()?,
+                difficulty: create_room.difficulty.try_into()?,
+            }
+        }
+        else if create_room.challenge == 1 {
+            RoomMode::Challenge {
+                episode: create_room.episode.try_into()?,
+            }
+        }
+        else if create_room.single_player == 1 {
+            RoomMode::Single {
+                episode: create_room.episode.try_into()?,
+                difficulty: create_room.difficulty.try_into()?,
+            }
+        }
+        else { // normal multimode
+            RoomMode::Multi {
+                episode: create_room.episode.try_into()?,
+                difficulty: create_room.difficulty.try_into()?,
+            }
+        };
+        
+        Ok(RoomState {
+            mode: room_mode,
+            name: create_room.name,
+            password: create_room.password,
+            maps: [0; 0x20],
+        })
+    }
+}