Bullet

•Best early game tower, good in mid/late

•Good against  early flying vectoids

•Bad for levels with limited space

•Weak against diamond

Upgrade 1

•Good stats for its cost

•Good against bosses, weak against diamond

•Can be paired with 2/4 bullet tower

Upgrade 2

•Increases power of nearby bullet towers

•If utilized correctly, one of the best 

but very expensive combo