well in the first mission you have 3 grenades and in the second mission you have 3 grenades.the grenades are just the fastest way to dispatch of enemy sligs without them noticing.
and for those wondering what me and alexfili are talking about we are making the game more interactive by me adding slig voices which alexfili will record
mission 3 added i will updated
link
i have added a radar to the game which makes it easier to track enemy movement