I made a mod!
For Factorio. It's research was WAY too simple for my taste and once you set up your lower-end science pack production you never needed to update it.
Now it has changed! Basically atm I assume recipes only use science packs and at most one of each type per "unit" of research. Basically if a recipe has 1 pack it gets no change, if green is added red count is doubled, if blue is added, red is doubled again+green is doubled and if alien science pack is added all other three are doubled once more.
Basically with all four packs being in-use for a tech you'd need 8x more red, 4x more green and 2x more blue science packs than usually.