I want to implement some steam coming out of a pipe and I'd like to make it go on and off, in a loop so to speak. Any ideas on how I'd be able to achieve that? Thanks in advance!

The simplest approach would be to have a logic_timer with its "Oscilator" flag checked, and then these couple of outputs:

• OnTimerHigh > [info_particle_system_name] > Start
• OnTimerLow > [info_particle_system_name] > Stop

Set the time between both outputs in the logic_timer's "Refire interval" property. And don't forget to send it an activation output, or make it start enabled

If you want a more random activation-deactivation of the particle, then take a look to the logic_case entity and its input "PickRandom".

Thanks once again, josepezdj!