diff --git a/tests/test_exp_gain.rs b/tests/test_exp_gain.rs
index 0db6ba9..4c2e5a3 100644
--- a/tests/test_exp_gain.rs
+++ b/tests/test_exp_gain.rs
@@ -1,8 +1,11 @@
 use elseware::common::serverstate::{ClientId, ServerState};
+use elseware::entity::character::{CharacterClass};
 use elseware::entity::gateway::{EntityGateway, InMemoryGateway};
 use elseware::common::leveltable::CharacterLevelTable;
 use elseware::ship::ship::{ShipServerState, SendShipPacket, RecvShipPacket};
 use elseware::ship::monster::MonsterType;
+use elseware::entity::item;
+use elseware::ship::room::{Difficulty};
 
 use libpso::packet::ship::*;
 use libpso::packet::messages::*;
@@ -190,3 +193,391 @@ async fn test_one_character_gets_full_exp_and_other_attacker_gets_partial() {
     assert!(c1.character.exp == exp);
     assert!(c2.character.exp == (exp as f32 * 0.8) as u32);
 }
+
+#[async_std::test]
+async fn test_exp_steal_min_1() {
+    let mut entity_gateway = InMemoryGateway::default();
+
+    let (_user1, char1) = new_user_character(&mut entity_gateway, "a1", "a", 1).await;
+
+    let mut p1_inv = Vec::new();
+    p1_inv.push(entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Weapon(
+                item::weapon::Weapon {
+                    weapon: item::weapon::WeaponType::Raygun,
+                    grind: 5,
+                    special: Some(item::weapon::WeaponSpecial::Kings),
+                    attrs: [Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Hit, value: 100}),
+                            Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
+                            None,],
+                    tekked: true,
+                }
+            ),
+        }).await.unwrap());
+
+    let equipped = item::EquippedEntity {
+        weapon: Some(p1_inv[0].id),
+        armor: None,
+        shield: None,
+        unit: [None; 4],
+        mag: None,
+    };
+    entity_gateway.set_character_equips(&char1.id, &equipped).await.unwrap();
+    entity_gateway.set_character_inventory(&char1.id, &item::InventoryEntity::new(p1_inv)).await.unwrap();
+
+    let mut ship = Box::new(ShipServerState::builder()
+        .gateway(entity_gateway.clone())
+        .build());
+    
+    log_in_char(&mut ship, ClientId(1), "a1", "a").await;
+    join_lobby(&mut ship, ClientId(1)).await;
+    create_room(&mut ship, ClientId(1), "room", "").await;
+
+    let enemy_id = {
+        let room = ship.blocks.0[0].rooms[0].as_ref().unwrap();
+        let enemy_id = (0..).filter_map(|i| {
+            room.maps.enemy_by_id(i).ok().and_then(|enemy| {
+                if enemy.monster == MonsterType::Booma {
+                    Some(i)
+                }
+                else {
+                    None
+                }
+            })
+        }).next().unwrap();
+        enemy_id
+    };
+
+    ship.handle(ClientId(1), &RecvShipPacket::Message(Message::new(GameMessage::ExperienceSteal(ExperienceSteal{
+        client: 0,
+        target: 0,
+        client2: enemy_id as u8,
+        target2: 16,
+        enemy_id: enemy_id as u16,
+    })))).await.unwrap().for_each(drop);
+
+    let c1 = ship.clients.get(&ClientId(1)).unwrap();
+    assert!(c1.character.exp == 1);
+}
+
+#[async_std::test]
+async fn test_exp_steal_max_80() {
+    let mut entity_gateway = InMemoryGateway::default();
+
+    let (_user1, mut char1) = new_user_character(&mut entity_gateway, "a1", "a", 1).await;
+    char1.exp = 80000000;
+    char1.char_class = CharacterClass::HUcast;
+    entity_gateway.save_character(&char1).await.unwrap();
+
+    let mut p1_inv = Vec::new();
+    p1_inv.push(entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Weapon(
+                item::weapon::Weapon {
+                    weapon: item::weapon::WeaponType::Raygun,
+                    grind: 5,
+                    special: Some(item::weapon::WeaponSpecial::Kings),
+                    attrs: [Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Hit, value: 100}),
+                            Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
+                            None,],
+                    tekked: true,
+                }
+            ),
+        }).await.unwrap());
+
+    let equipped = item::EquippedEntity {
+        weapon: Some(p1_inv[0].id),
+        armor: None,
+        shield: None,
+        unit: [None; 4],
+        mag: None,
+    };
+    entity_gateway.set_character_equips(&char1.id, &equipped).await.unwrap();
+    entity_gateway.set_character_inventory(&char1.id, &item::InventoryEntity::new(p1_inv)).await.unwrap();
+
+    let mut ship = Box::new(ShipServerState::builder()
+        .gateway(entity_gateway.clone())
+        .build());
+
+    log_in_char(&mut ship, ClientId(1), "a1", "a").await;
+    join_lobby(&mut ship, ClientId(1)).await;
+    create_room_with_difficulty(&mut ship, ClientId(1), "room", "", Difficulty::Ultimate).await;
+
+    let enemy_id = {
+        let room = ship.blocks.0[0].rooms[0].as_ref().unwrap();
+        let enemy_id = (0..).filter_map(|i| {
+            room.maps.enemy_by_id(i).ok().and_then(|enemy| {
+                if enemy.monster == MonsterType::Booma {
+                    Some(i)
+                }
+                else {
+                    None
+                }
+            })
+        }).next().unwrap();
+        enemy_id
+    };
+
+    ship.handle(ClientId(1), &RecvShipPacket::Message(Message::new(GameMessage::ExperienceSteal(ExperienceSteal{
+        client: 0,
+        target: 0,
+        client2: enemy_id as u8,
+        target2: 16,
+        enemy_id: enemy_id as u16,
+    })))).await.unwrap().for_each(drop);
+
+    let c1 = ship.clients.get(&ClientId(1)).unwrap();
+    assert!(c1.character.exp == 80000080);
+}
+
+#[async_std::test]
+async fn test_exp_steal_android_boost_in_ultimate() {
+    let mut entity_gateway = InMemoryGateway::default();
+
+    let (_user1, mut char1) = new_user_character(&mut entity_gateway, "a1", "a", 1).await;
+    char1.exp = 80000000;
+    char1.char_class = CharacterClass::HUcast;
+    entity_gateway.save_character(&char1).await.unwrap();
+
+    let (_user2, mut char2) = new_user_character(&mut entity_gateway, "a2", "a", 1).await;
+    char2.exp = 80000000;
+    char2.char_class = CharacterClass::HUmar;
+    entity_gateway.save_character(&char2).await.unwrap();
+
+    let mut p1_inv = Vec::new();
+    p1_inv.push(entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Weapon(
+                item::weapon::Weapon {
+                    weapon: item::weapon::WeaponType::Raygun,
+                    grind: 5,
+                    special: Some(item::weapon::WeaponSpecial::Kings),
+                    attrs: [Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Hit, value: 100}),
+                            Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
+                            None,],
+                    tekked: true,
+                }
+            ),
+        }).await.unwrap());
+
+    let equipped = item::EquippedEntity {
+        weapon: Some(p1_inv[0].id),
+        armor: None,
+        shield: None,
+        unit: [None; 4],
+        mag: None,
+    };
+    entity_gateway.set_character_equips(&char1.id, &equipped).await.unwrap();
+    entity_gateway.set_character_inventory(&char1.id, &item::InventoryEntity::new(p1_inv)).await.unwrap();
+
+    let mut p2_inv = Vec::new();
+    p2_inv.push(entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Weapon(
+                item::weapon::Weapon {
+                    weapon: item::weapon::WeaponType::Raygun,
+                    grind: 5,
+                    special: Some(item::weapon::WeaponSpecial::Kings),
+                    attrs: [Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Hit, value: 100}),
+                            Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
+                            None,],
+                    tekked: true,
+                }
+            ),
+        }).await.unwrap());
+
+    let equipped = item::EquippedEntity {
+        weapon: Some(p2_inv[0].id),
+        armor: None,
+        shield: None,
+        unit: [None; 4],
+        mag: None,
+    };
+    entity_gateway.set_character_equips(&char2.id, &equipped).await.unwrap();
+    entity_gateway.set_character_inventory(&char2.id, &item::InventoryEntity::new(p2_inv)).await.unwrap();
+
+    let mut ship = Box::new(ShipServerState::builder()
+        .gateway(entity_gateway.clone())
+        .build());
+
+    log_in_char(&mut ship, ClientId(1), "a1", "a").await;
+    join_lobby(&mut ship, ClientId(1)).await;
+    create_room_with_difficulty(&mut ship, ClientId(1), "room", "", Difficulty::Ultimate).await;
+    log_in_char(&mut ship, ClientId(2), "a2", "a").await;
+    join_lobby(&mut ship, ClientId(2)).await;
+    join_room(&mut ship, ClientId(2), 0).await;
+
+    let enemy_id = {
+        let room = ship.blocks.0[0].rooms[0].as_ref().unwrap();
+        let enemy_id = (0..).filter_map(|i| {
+            room.maps.enemy_by_id(i).ok().and_then(|enemy| {
+                if enemy.monster == MonsterType::Booma {
+                    Some(i)
+                }
+                else {
+                    None
+                }
+            })
+        }).next().unwrap();
+        enemy_id
+    };
+
+    ship.handle(ClientId(1), &RecvShipPacket::Message(Message::new(GameMessage::ExperienceSteal(ExperienceSteal{
+        client: 0,
+        target: 0,
+        client2: enemy_id as u8,
+        target2: 16,
+        enemy_id: enemy_id as u16,
+    })))).await.unwrap().for_each(drop);
+
+    ship.handle(ClientId(2), &RecvShipPacket::Message(Message::new(GameMessage::ExperienceSteal(ExperienceSteal{
+        client: 0,
+        target: 0,
+        client2: enemy_id as u8,
+        target2: 16,
+        enemy_id: enemy_id as u16,
+    })))).await.unwrap().for_each(drop);
+
+    let c1 = ship.clients.get(&ClientId(1)).unwrap();
+    let c2 = ship.clients.get(&ClientId(2)).unwrap();
+    println!("c1 exp: {:?}, c2 exp: {:?}", c1.character.exp, c2.character.exp);
+    assert!(c1.character.exp == 80000080);
+    assert!(c2.character.exp == 80000032);
+}
+
+#[async_std::test]
+async fn test_exp_steal_no_android_boost_in_vhard() {
+        let mut entity_gateway = InMemoryGateway::default();
+
+    let (_user1, mut char1) = new_user_character(&mut entity_gateway, "a1", "a", 1).await;
+    char1.exp = 80000000;
+    char1.char_class = CharacterClass::HUcast;
+    entity_gateway.save_character(&char1).await.unwrap();
+
+    let (_user2, mut char2) = new_user_character(&mut entity_gateway, "a2", "a", 1).await;
+    char2.exp = 80000000;
+    char2.char_class = CharacterClass::HUmar;
+    entity_gateway.save_character(&char2).await.unwrap();
+
+    let mut p1_inv = Vec::new();
+    p1_inv.push(entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Weapon(
+                item::weapon::Weapon {
+                    weapon: item::weapon::WeaponType::Raygun,
+                    grind: 5,
+                    special: Some(item::weapon::WeaponSpecial::Kings),
+                    attrs: [Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Hit, value: 100}),
+                            Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
+                            None,],
+                    tekked: true,
+                }
+            ),
+        }).await.unwrap());
+
+    let equipped = item::EquippedEntity {
+        weapon: Some(p1_inv[0].id),
+        armor: None,
+        shield: None,
+        unit: [None; 4],
+        mag: None,
+    };
+    entity_gateway.set_character_equips(&char1.id, &equipped).await.unwrap();
+    entity_gateway.set_character_inventory(&char1.id, &item::InventoryEntity::new(p1_inv)).await.unwrap();
+
+    let mut p2_inv = Vec::new();
+    p2_inv.push(entity_gateway.create_item(
+        item::NewItemEntity {
+            item: item::ItemDetail::Weapon(
+                item::weapon::Weapon {
+                    weapon: item::weapon::WeaponType::Raygun,
+                    grind: 5,
+                    special: Some(item::weapon::WeaponSpecial::Kings),
+                    attrs: [Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Hit, value: 100}),
+                            Some(item::weapon::WeaponAttribute{attr: item::weapon::Attribute::Dark, value: 30}),
+                            None,],
+                    tekked: true,
+                }
+            ),
+        }).await.unwrap());
+
+    let equipped = item::EquippedEntity {
+        weapon: Some(p2_inv[0].id),
+        armor: None,
+        shield: None,
+        unit: [None; 4],
+        mag: None,
+    };
+    entity_gateway.set_character_equips(&char2.id, &equipped).await.unwrap();
+    entity_gateway.set_character_inventory(&char2.id, &item::InventoryEntity::new(p2_inv)).await.unwrap();
+
+    let mut ship = Box::new(ShipServerState::builder()
+        .gateway(entity_gateway.clone())
+        .build());
+
+    log_in_char(&mut ship, ClientId(1), "a1", "a").await;
+    join_lobby(&mut ship, ClientId(1)).await;
+    create_room_with_difficulty(&mut ship, ClientId(1), "room", "", Difficulty::VeryHard).await;
+    log_in_char(&mut ship, ClientId(2), "a2", "a").await;
+    join_lobby(&mut ship, ClientId(2)).await;
+    join_room(&mut ship, ClientId(2), 0).await;
+
+    let enemy_id = {
+        let room = ship.blocks.0[0].rooms[0].as_ref().unwrap();
+        let enemy_id = (0..).filter_map(|i| {
+            room.maps.enemy_by_id(i).ok().and_then(|enemy| {
+                if enemy.monster == MonsterType::Booma {
+                    Some(i)
+                }
+                else {
+                    None
+                }
+            })
+        }).next().unwrap();
+        enemy_id
+    };
+
+    ship.handle(ClientId(1), &RecvShipPacket::Message(Message::new(GameMessage::ExperienceSteal(ExperienceSteal{
+        client: 0,
+        target: 0,
+        client2: enemy_id as u8,
+        target2: 16,
+        enemy_id: enemy_id as u16,
+    })))).await.unwrap().for_each(drop);
+
+    ship.handle(ClientId(2), &RecvShipPacket::Message(Message::new(GameMessage::ExperienceSteal(ExperienceSteal{
+        client: 0,
+        target: 0,
+        client2: enemy_id as u8,
+        target2: 16,
+        enemy_id: enemy_id as u16,
+    })))).await.unwrap().for_each(drop);
+
+    let c1 = ship.clients.get(&ClientId(1)).unwrap();
+    let c2 = ship.clients.get(&ClientId(2)).unwrap();
+    println!("c1 exp: {:?}, c2 exp: {:?}", c1.character.exp, c2.character.exp);
+    assert!(c1.character.exp == 80000010);
+    assert!(c2.character.exp == 80000010);
+}
+
+#[async_std::test]
+async fn test_exp_steal_doesnt_exceed_100p() {
+    assert!(false)
+}
+
+#[async_std::test]
+async fn test_exp_steal_multihit_penalty() {
+    assert!(false)
+}
+
+#[async_std::test]
+async fn test_each_client_can_steal_exp_from_same_enemy() {
+    assert!(false)
+}
+
+#[async_std::test]
+async fn test_cannot_steal_exp_from_boss() {
+    assert!(false)
+}
+