Often times my when I press shift+tab to bring up my steam overlay while playing evolve, it doesn’t work. Not sure what causes this.
Are you sure steam is running? Open your Task Manager and see if a program called ‘steam overlay’ is running. If it is, try restarting steam.
I know steam is running because I can alt-tab out of the game and use steam to add friends and invite them into my matches.
I’ve tried restarting steam twice so far, the first time it worked. The second time I had this issue, restarting steam didn’t work.
I believe the Devs have stated that this is a bug on Steam’s end, and that there isn’t anything they can do for it personally besides make Valve aware of the problem.