Did you feed him pills from your neighbour? It is in Quest log, if you accidentally skipped MC comment about it.
Buy pills
Buy cake (or it was coke, i dont remember, food anyway, check in Quest log)
Assemble it in inventory (pills into food)
Gift it to Tyler
Fight
...
profit
I don't remember challenge in this game. Just fetch-quests by log, dull grind some stats and reload of couple randoms. Dev should pay more attention to plot development, but it seems he is more in love with his mechanic crunch. No, i dont agree with you about front page. Dev is not here yet. Just yet. Too much grind, not much actual story content, currently, and very slow development.