You can't play with bots on the PC version which sucks. Especially when you can do what me and my bro did on the PS2 version.
We made 2 bots. The Jimmy and Rqbert. Trained them to the max lvl and the set them to very aggressive and we would play against them in any lvl but especially the space one since it was wide open and had the jumps.
Then we would set their weapon preferences or just have one gun per map to see if me and my bro would win against them. Yea if we won it was b/c we found a tiny space and had a stick grenades everywhere. They could normaly hit us in the air with the rail gun from across any map. Against bots they would ravage them.
If only they added that into the PC that would be a fun online multiplayer to have.