I have downloaded the current version of module game from http://download.moodle.org/download.php/direct/plugins/mod/game.zip
When I go to admin I'd got:
Debug info: Plugin is not compatible with Moodle 2.x or later.
Error code: detectedbrokenplugin
line 553 of /lib/upgradelib.php: plugin_defective_exception thrown
line 358 of /lib/upgradelib.php: call to upgrade_plugins_modules()
line 1524 of /lib/upgradelib.php: call to upgrade_plugins()
line 329 of /admin/index.php: call to upgrade_noncore()
The moodle version is 2.3.3+ (Build 20121123).