Three Achievements in the Steam version of Deathtrap are currently not working as they should.
"No Pasaran!" and "Killing floor," which ask a player to build 1000 tower/floor traps respectively, do not seem to track progress at all. Both Achievements report 0/1000 progress for myself and several other players. Similarly, "Jack of all trades," which asks a player to build 15 different types of traps in one level, does not seem to work as intended.
Looking at Steam global Achievement statistics for Deathtrap, less than 5% of players have credit for these Achievements, which leads me to believe they did work at one point, but have since stopped.