- Then when you create a server, enable cheats, and debug bots (enabling test mode is also recommended)

- Join the Humans or Zombies team, wait for warmup to end (or disable it)

- Open the console, enter the "bot_zps_add_zombie" command if you joined human, the "bot_zps_add_human" command if you joined zombies. enter it again as you wish if you want more bots

- When the enemy bots spawn, use the find_ent console command like this. "find_ent player"

-This will display player related entities on the map. look at the ones that say "player" only, there is an ent index next to it that directly indicates the specific entity number on the map (like a number 3, 5, 9, or 12, for example)

-You can use the "ent_teleport [entindex]" command based on the ent index you want to spawn. usually the first ent index, 1, is you, the player. so dont pick that one. pick the others.

-Enter the ent_teleport commands accordingly. like this
"ent_teleport 3"
"ent_teleport 5"
"ent_teleport 9"
"ent_teleport 12"

-You can also make them mimic your actions (like moving, attacking or jumping) with "bot_zps_mimic (0/1)" and change the direction to face you with "bot_zps_mimic_yaw_offset 175" (I prefer 160, 150 or 130 degrees so they can likely miss their melee attacks

-If you kill them, you can also enter these ent_teleport commands again and they will actually respawn!

- Bind your keys to console commands if you want to. Preferably farther away from where you usually use the controls (like the numpad or the symbol keys) (like bind alt "toggle host_timescale 0.2 1")

-This game clearly has a different bot system, but this should make your solo play much smoother!

- Many other Source games' multiplayer mode generally has a more traditional bot system, like "bot_mimic" or "bot_add" for example. one important command you can use in other source games is "bot_teleport". You enter the command according to the bot name. For example, "bot_teleport bot11". when that fails, you can use the find_ent and ent_teleport commands universally.