Druidshinobi: You make it sound good, but now i'm in a predictament.
- Hydraphobia £2.20 (Steam)
- Stronghold Collection £3.49 (GG)
I only want to buy one....
These are two different genres of games, so it's really a matter of whether or not you like Third person-action or a strategy game. What I can tell you though, is that you will get many more hours and replayability out of Stronghold than out of Hydrophobia.
I already owned Stronghold collection from Steam, so I got Hydrophobia recently. My recommendation is for you to get Stronghold as long as you enjoy strategy games (it has similar gameplay to Dwarf Fortress though a LOT LOT LOT less complex). It'll definitely be more fun in the long run.