I was just attempting a speedrun for the in a rush achievement and had the swap ability suddenly vanish and ruin my run. it wasn't that long after gaining the ability, i had collected swap and exited through numerous rooms and checkpoints using swap all the way, until i got killed just before the first room that swap is used to swap a battery onto a reactor. I then realised that i had a checkpoint seconds before and swap had gone.
It would have wasted 5/10 mins going back and forth to the swap room again so i just restarted, i don't know what would've happened had i returned.
Last edited by Scottcool; 02-26-2012 at 05:20 PM.