These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
And It Worked: In the first Geneforge joining Trajkov gets you arguably one of the best endings. There is a terrible war and you and Trajkov Take Over the World, but Trajkov grants the Serviles human rights and ends many of the Shapers' more evil practices.
Game Breaker: In some games, the Vlish. They are cheap to create and cause both slow and poison status effects, making a sufficiently-leveled pack of them unbeatable even on higher difficulty levels.
Goddamn Bats: Enemy Vlish. They swarm and cause a variety of negative status effects.
Podlings in V have area-effect attacks that inflict negative status effects. And since different varieties inflict different effects, it can get very annoying very quickly.