"current game:" drop down only shows ep2 and I want to make deathmatch maps

I've been having all kinds of problems running my maps. My maps so far have been simple boxes with light_environment and env_sun, info_player_start, water, and some displacement surfaces.

HL2 deathmatch has been crashing hard and often with my simple test maps, I wonder if it has something to do with the drop down selector in the sdk launcher "current game:". It only shows Half-Life Episode 2 as an option. Could this be a source of my problems? And yes I do have HL2DM installed and it runs everyone else's maps just fine. Mine are all bogus except for a hollow cube, a point light, and an info_player_start.

buildcubemaps crashes hl2dm.

Thanks in advance for any help. I hope I'm not too wordy.

No. This problem has been answered numerous times.

You need to include " -applaunch 211 -engine ep1" in a Steam shortcut to access the older games (ep1, deathmatch).

Thank you so much! My maps are running perfectly now! no more crashes. Buildcubemaps also works perfectly.