diff --git a/ckan_meta_tester/dummy_game_instance.py b/ckan_meta_tester/dummy_game_instance.py
index 8856eef..0f85a18 100644
--- a/ckan_meta_tester/dummy_game_instance.py
+++ b/ckan_meta_tester/dummy_game_instance.py
@@ -10,10 +10,7 @@
 
 
 class DummyGameInstance:
-
     SAVED_REGISTRY=Path('/tmp/registry.json')
-    MAKING_HISTORY_VERSION=GameVersion('1.4.1')
-    BREAKING_GROUND_VERSION=GameVersion('1.7.1')
 
     def __init__(self, where: Path, ckan_exe: Path, addl_repo: Path, main_ver: GameVersion, other_versions: List[GameVersion], cache_path: Path, game: Game) -> None:
         self.where = where
@@ -36,7 +33,7 @@ def __enter__(self) -> 'DummyGameInstance':
              '--game', self.game.short_name,
              '--set-default', '--headless',
              'dummy', self.where, str(self.main_ver),
-             *self._available_dlcs(self.main_ver)],
+             *self.game.dlc_cmdline_flags(self.main_ver)],
             capture_output=self.capture)
         for ver in self.other_versions:
             logging.debug('Setting version %s compatible', ver)
@@ -66,12 +63,6 @@ def __enter__(self) -> 'DummyGameInstance':
         logging.debug('Dummy instance is ready')
         return self
 
-    def _available_dlcs(self, ver: GameVersion) -> List[str]:
-        return [
-            *(['--MakingHistory',  '1.1.0'] if ver >= self.MAKING_HISTORY_VERSION  else []),
-            *(['--BreakingGround', '1.0.0'] if ver >= self.BREAKING_GROUND_VERSION else [])
-        ]
-
     def __exit__(self, exc_type: Type[BaseException],
                  exc_value: BaseException, traceback: TracebackType) -> None:
         logging.debug('Removing instance from CKAN instance list')
diff --git a/ckan_meta_tester/game.py b/ckan_meta_tester/game.py
index d6718ee..0f9f4ac 100644
--- a/ckan_meta_tester/game.py
+++ b/ckan_meta_tester/game.py
@@ -19,6 +19,9 @@ def short_name(self) -> str:
     def _versions_from_json(self, json: object) -> List[GameVersion]:
         raise NotImplementedError
 
+    def dlc_cmdline_flags(self, ver: GameVersion) -> List[str]:
+        return []
+
     @staticmethod
     def from_id(game_id: str = 'KSP') -> 'Game':
         if game_id == 'KSP':
@@ -31,25 +34,36 @@ def from_id(game_id: str = 'KSP') -> 'Game':
 class Ksp1(Game):
     BUILDS_URL = 'https://raw.githubusercontent.com/KSP-CKAN/CKAN-meta/master/builds.json'
     BUILD_PATTERN=re.compile(r'\.[0-9]+$')
+    MAKING_HISTORY_VERSION=GameVersion('1.4.1')
+    BREAKING_GROUND_VERSION=GameVersion('1.7.1')
 
     @property
     def short_name(self) -> str:
         return 'KSP'
 
-    def _versions_from_json(self, json: object) -> List[GameVersion]:
+    def dlc_cmdline_flags(self, ver: GameVersion) -> List[str]:
+        return [*(['--MakingHistory',  '1.1.0'] if ver >= self.MAKING_HISTORY_VERSION  else []),
+                *(['--BreakingGround', '1.0.0'] if ver >= self.BREAKING_GROUND_VERSION else [])]
 
-        return [GameVersion(v) for v in OrderedDict.fromkeys(map(
-            lambda v: self.BUILD_PATTERN.sub('', v),
-            cast(Dict[str, Dict[str, str]], json).get('builds', {}).values()))]
+    def _versions_from_json(self, json: object) -> List[GameVersion]:
+        return [GameVersion(v)
+                for v
+                in OrderedDict.fromkeys(map(lambda v: self.BUILD_PATTERN.sub('', v),
+                                            cast(Dict[str, Dict[str, str]], json)
+                                            .get('builds', {})
+                                            .values()))]
 
 
 class Ksp2(Game):
     BUILDS_URL = 'https://raw.githubusercontent.com/KSP-CKAN/KSP2-CKAN-meta/master/builds.json'
+    BUILD_PATTERN=re.compile(r'\.[0-9]+$')
 
     @property
     def short_name(self) -> str:
         return 'KSP2'
 
     def _versions_from_json(self, json: object) -> List[GameVersion]:
-        # The KSP2 builds.json doesn't have build ids
-        return [GameVersion(v) for v in cast(List[str], json)]
+        return [GameVersion(v)
+                for v
+                in OrderedDict.fromkeys(map(lambda v: self.BUILD_PATTERN.sub('', v),
+                                                  cast(List[str], json)))]