Keep in mind these are just prompts, if you use it do whatever you want with it
An tower defense game with the 9 mercenarys from TF2.
Sniper, longest range, high damage slow reload time costs 5 currency
Heavy, short range, high damage, slow reload time also costs 5 currency
Scout, runs from your base to the enemy base shooting. If he reaches the enemy base he EXPLODES costs 7 currency
Demoman, does a demoknight charge and destroys everything, make sure to add a special enemy that stops him costs 10 currency
Spy, goes invisible and runs through enemies, if he reaches the enemy base he back stabs it dealing considerable damage, costs 6 currency
Soldier, shoots rockets, long range, medium damage, fast reload time costs 4 currency
Medic, heals units within a certain range costs 4 currency
Pyro, shoots fire, short range, high damage, slow reload time costs 3 currency
Engineer, medium range, medium damage, fast reload, can turn into a sentry with 3 stages after getting 10 kills
Sentry stages
Mini: medium range medium damage instant reload
Medium sentry: Long range, high damage, instant reload
Rocket sentry, long range, high damage, instant reload, shoots 4 rockets out every 10 seconds