Free-to-play defend-o-shooter Orcs Must Die! Unchained and both games in Robot Entertainment’s turn-based Hero Academy series are set to close their doors this April. In an apologetic letter to players, CEO Patrick Hudson explains that the games simply cost more to run than they make back in return. The studio itself doesn’t seem to be in immediate danger, with Robot currently working on two new games that they plan to unveil later this year. Account registration for the games should end soon, but the last few Unchained players will find themselves with a sack of currency to spend over these final three months.