Here I want to share some ideas for new content that would (probably) fit into TerRoguelike well.
I will start with the items, and then go onto more things like enemies, stages, All of that, in a second discussion.
Idea 1: The "Gasoline canister". This item would make every fire-related item deal 20% more damage over time. This item would be a blue rarity item, and would add 15% more damage every stack. The item would look like a big can with oil spilling out of the top.
Idea 2: The "Soul sparker". This item would make it so every enemy would have a 10% chance to spawn a ghost of itself that would haunt a random enemy, (Including you,) and would slow it by 50%. Every stack would increase the chance of a ghost spawning by 10%. The item would be a green rarity item. The item would look like a blue lighter that would have a large blue flame in the shape of a howling face coming out of it.
Idea 3: the "Lightning boots". These boots would make every 5 tiles you move in a straight line, you move 5% faster. This would be a red item, and would be great for the final end sequence of the game. The item would like a pair of boots with sparks coming out of the back.
Idea 4: the "Alien heart". This item would increase your damage by 5% every time you kill an enemy with a sword. This would be permanent, but again, you do have to use a sword to get the buff. This item would be a green rarity, and would increase the damage by 3% per stack.
That is all for the items, and I will make a second discussion later.