Idle Slayer has been a fun, free to play game with unintrusive microtransactions for some time. Not anymore.

At the time of this review, the last update seems to be the developer literally trolling the players. He slowed the game's speed down by over 50% making it take much longer to make progress. He made arrows (which had always pierced enemies) only pierce some enemies on some stages with no explanation or ability to upgrade around it.

Additionally, the game contains many "achievements" that are 100% RNG based. Players had developed a strategy to take some of the RNG out of one such achievement. The developer completely reworked how the games internal timers work just to eliminate this strategy while simultaneously adding an upgrade that players could purchase that shares the same name as the strategy. The upgrade has nothing to do with the strategy and doesn't help you accomplish anything in particular. Its just a slap in the face of players who enjoyed the game enough to really get into the meta.

tldr; I don't know why the dev is trying to sabotage what WAS a decent, enjoyable game but he has, and I am not sticking around for more of this weird, unforced self-destruction.